Yan Jun Xi, Yong Jun Liu, Zhi Xin Wang and Jin Bin Liu
The purpose of this paper is to investigate the oxidation behavior of Ti‐48Al‐8Cr‐2Ag (at.%) at 900°C and 1000°C for various different times.
Abstract
Purpose
The purpose of this paper is to investigate the oxidation behavior of Ti‐48Al‐8Cr‐2Ag (at.%) at 900°C and 1000°C for various different times.
Design/methodology/approach
Laboratory tests were performed to determine growth process of the oxide scale at 900°C and 1000°C for various different times with SEM/EDX, XRD and TEM.
Findings
Merely Al2O3 occurred on the Laves phase at the initial stage at 900°C, while a mixture of Al2O3+TiO2 formed at the initial stage at 1000°C. Oxidation rate of the alloy at 900°C after long‐term oxidation was higher than that at 1000°C because a dense Al2O3 scale formed on the surface at 1000°C.
Originality/value
The paper shows that the oxidation behavior of TiAl alloy at initial stage is the basis of the revealing mechanism of oxidation. It is necessary to further investigate the oxidation of Ti‐Al‐Cr‐Ag alloy in more detail to clearly understand its oxidation process and growth process of the oxide scale.
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Yan Jun Xi, Yong Jun Liu, Zhi Xin Wang and Jin Bin Liu
The purpose of this paper is to investigate the high‐temperature oxidation behavior in air at 900‐1,000°C and electrochemical corrosion performance in 3.5 percent NaCl solution of…
Abstract
Purpose
The purpose of this paper is to investigate the high‐temperature oxidation behavior in air at 900‐1,000°C and electrochemical corrosion performance in 3.5 percent NaCl solution of Ti‐24Al‐17Nb‐0.5Mo (at. %) alloy with Ti‐48Al‐8Cr‐2Ag (at. %) coating.
Design/methodology/approach
Laboratory tests are performed to determine the effect of the Ti‐48Al‐8Cr‐2Ag (at. %) coating on the corrosion performance of Ti3Al alloy.
Findings
It is found that the oxidation rate of sputtered Ti‐48Al‐8Cr‐2Ag nanocrystalline coating is lower than that of the Ti3Al alloy at 900°C. The former forms a scale of merely Al2O3 and the latter forms a scale of TiO2. However, the Ti‐48Al‐8Cr‐2Ag nanocrystalline coating shows a slightly higher oxidation rate than did the Ti3Al alloy at 1,000°C, because outer TiO2 scale forms and columnar boundaries of the coating give a larger actual oxidation area than the original alloy. The coating shows the excellent electrochemical corrosion resistance in 3.5 percent NaCl solution because it exhibits stable passive polarization behavior without any overpassivation phenomena.
Originality/value
TiAlCrAg coatings may become a promising protective coating for Ti3Al‐base intermetallics, which improve the Al2O3 scale formation and make the passivation stable.
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This study aims to understand the epistemic foundation of the classification applied in the first Chinese library catalogue, the Seven Epitomes (Qilue).
Abstract
Purpose
This study aims to understand the epistemic foundation of the classification applied in the first Chinese library catalogue, the Seven Epitomes (Qilue).
Design/methodology/approach
Originating from a theoretical stance that situates knowledge organization in its social context, the study applies a multifaceted framework pertaining to five categories of textual data: the Seven Epitomes; biographical information about the classificationist Liu Xin; and the relevant intellectual, political, and technological history.
Findings
The study discovers seven principles contributing to the epistemic foundation of the catalogue's classification: the Han imperial library collection imposed as the literary warrant; government functions considered for structuring texts; classicist morality determining the main classificatory structure; knowledge perceived and organized as a unity; objects, rather than subjects, of concern affecting categories at the main class level; correlative thinking connecting all text categories to a supreme knowledge embodied by the Six Classics; and classicist moral values resulting in both vertical and horizontal hierarchies among categories as well as texts.
Research limitations/implications
A major limitation of the study is its focus on the main classes, with limited attention to subclasses. Future research can extend the analysis to examine subclasses of the same scheme. Findings from these studies may lead to a comparison between the epistemic approach in the target classification and the analytic one common in today's bibliographic classification.
Originality/value
The study is the first to examine in depth the epistemic foundation of traditional Chinese bibliographic classification, anchoring the classification in its appropriate social and historical context.
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Qiang Xiao, Liu Yi-Cong, Yue-Peng Zhou, Zhi-Hong Wang, Sui-Xin Fan, Jun-Hu Meng and Junde Guo
Given the current friction and wear challenges faced by automobile parts and bearings, this study aims to identify a novel texture for creating anti-friction and wear-resistant…
Abstract
Purpose
Given the current friction and wear challenges faced by automobile parts and bearings, this study aims to identify a novel texture for creating anti-friction and wear-resistant surfaces. This includes detailing the preparation process with the objective of mitigating friction and wear in working conditions.
Design/methodology/approach
Femtosecond laser technology was used to create a mango-shaped texture on the surface of GCr15 bearing steel. The optimized processing technology of the texture surface was obtained through adjusting the laser scanning speed. The tribological behavior of the laser-textured surface was investigated using a reciprocating tribometer.
Findings
The friction coefficient of the mango-shaped texture surface is 25% lower than that of the conventional surface, this can be attributed to the reduced contact area between the friction ball and the micro-textured surface, leading to stress concentration at the extrusion edge and a larger stress distribution area on the contact part of the ball and disk compared to the conventional surface and the function of the micro-texture in storing wear chips during the sliding process, thereby reducing secondary wear.
Originality/value
The mango-shaped textured surface in this study demonstrates effective solutions for some of the friction and wear issues, offering significant benefits for equipment operation under light load conditions.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2024-0127/
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Xu Long, Xianyi Zhao, Kainan Chong, Yutai Su, Kim S. Siow, Zhi Wang, Fengrui Jia and Xin Wan
The purpose of this paper is to analyze and compare the mechanical properties of sintered nanosilver with different porosities at both the mesoscopic and macroscopic scales and to…
Abstract
Purpose
The purpose of this paper is to analyze and compare the mechanical properties of sintered nanosilver with different porosities at both the mesoscopic and macroscopic scales and to conduct a multiscale analysis of the porosity effect on the mechanical properties of sintered nanosilver.
Design/methodology/approach
This paper establishes a mesoscopic model for the uniaxial tension of sintered nanosilver and a macroscopic model for chips containing sintered silver layers. Using the finite element method, combined with crystal plasticity theory and unified creep plasticity theory, a multiscale analysis is conducted for the mechanical properties of sintered nanosilver. First, stress distribution characteristics under uniaxial tensile loading for different porosities in sintered nanosilver polycrystal models are analyzed at the mesoscopic scale. Second, at the macroscopic scale, the mechanical performance of sintered nanosilver layers with varying porosities in high-power chip models under cyclic loading is analyzed. Finally, the porosity influence on the damage evolution in sintered nanosilver is summarized, and simulations are conducted to explore the evolution of damage parameters in sintered nanosilver under different porosities.
Findings
In the mesoscopic model, the presence of mesoscale voids affects the stress distribution in sintered nanosilver subjected to tensile loading. Sintered nanosilver with lower porosity exhibits higher tensile strength. In the macroscopic model, sintered nanosilver layers with lower porosity correspond to a more uniform stress distribution, whereas higher porosity leads to faster accumulation of plastic strain in the sintered layer. During chip packaging processes, improving processes to reduce the porosity of sintered layers can delay the initiation of damage and the propagation of cracks in sintered nanosilver.
Practical implications
During chip packaging processes, improving processes to reduce the porosity of sintered layers can delay the initiation of damage and the propagation of cracks in sintered nanosilver.
Originality/value
This paper innovatively uses a mesoscopic crystal plasticity constitutive model and a macroscopic unified creep plasticity constitutive model to analyze the mechanical behavior of sintered nanosilver with different porosities. It comprehensively investigates and explains the influence of porosity on the mechanical performance of sintered nanosilver across multiple scales.
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Shufeng Tang, Jingfang Ji, Yun Zhi, Wei Yuan, Hong Chang, Xin Wang and Xiaodong Guo
Continuum robots offer unique advantages in various specialized environments, particularly in confined or hard-to-reach spaces. Inverse kinematics and real-time shape estimation…
Abstract
Purpose
Continuum robots offer unique advantages in various specialized environments, particularly in confined or hard-to-reach spaces. Inverse kinematics and real-time shape estimation constitute crucial aspects of closed-loop control for continuum robots, presenting challenging problems. This paper aims to present an inverse kinematics and shape reconstruction method, which relies solely on the knowledge of base and end positions and orientations.
Design/methodology/approach
Based on the constant curvature assumption, continuum robots are regarded as spatial curves composed of circular arcs. Using geometric relationships, the mathematical relationships between the arc chords, points on the bisecting plane and the coordinate axes are established. On this basis, the analytical solution of the inverse kinematics of the continuum robots is derived. Using the positions and orientations of the base and end of the continuum robots, the Levenberg–Marquardt algorithm is used to solve the positions of the cubic Bezier curves, and a new method of spatial shape reconstruction of continuum robots is proposed.
Findings
The inverse kinematics and spatial shape reconstruction simulation of the continuum robot are carried out, and the spatial shape measurement experimental platform for the continuum robot is constructed to compare the measured and reconstructed spatial shapes. The results show that the maximum relative error between the actual shape and the reconstructed shape of the continuum robot is 2.08%, which verifies the inverse kinematics and shape reconstruction model. Additionally, when the bending angle of a single bending section of the continuum robot is less than 135°, the shape reconstruction accuracy is higher.
Originality/value
The proposed inverse kinematics solution method avoids iterative solving, and the shape reconstruction model does not rely on mechanical models. It has the advantages of being simple to solve, highly accurate and fast in computation, making it suitable for real-time control of continuum robots.
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Wan-Ju Chou and Bor-Shiuan Cheng
While current management theory is largely based on economic assumptions, there is evidence to suggest capitalism is at a crossroads. Humanistic management is accordingly proposed…
Abstract
Purpose
While current management theory is largely based on economic assumptions, there is evidence to suggest capitalism is at a crossroads. Humanistic management is accordingly proposed as an alternative new paradigm. The present study follows this approach in considering Confucianism as a humanistic practice. The purpose of this study is to explore humanistic leadership displayed by a Confucian leader and how he/she presents humanistic concern in corporate management to pursue the common good.
Design/methodology/approach
This study adopted a structured–pragmatic–situational approach to conduct a case study and collected data from three sources: semi-structured interviews, consultant observations and archival data.
Findings
The findings reveal that a Confucian leader takes all stakeholders' interests into account while engaging in corporate management and displays humanistic behaviors toward the stakeholders that are in line with five Confucian virtues. The leader cultivates the employees as Confucian humanistic agents. These employees accordingly act as bridges to transmit the humanistic spirit to their customers and other industries in the same market. To initiate an industry change to achieve collective welfare, a Confucian leader must first influence his/her primary stakeholders. The primary stakeholders next collectively influence the secondary stakeholders (i.e. the industry). Consequently, the overall goal of the common good is ultimately sustained.
Originality/value
This study identifies valuable practical implications for humanistic practices in corporate management from a Confucian perspective. In addition, this study takes a significant academic step forward by illuminating the humanistic paradigm.
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Xin Li, Siwei Wang, Xue Lu and Fei Guo
This paper aims to explore the impact of green finance on the heterogeneity of enterprise green technology innovation and the underlying mechanism between them.
Abstract
Purpose
This paper aims to explore the impact of green finance on the heterogeneity of enterprise green technology innovation and the underlying mechanism between them.
Design/methodology/approach
Using the data of China's A-share listed enterprises from 2008 to 2020 and the fixed effect model, the authors empirically explore the relationship and mechanism between green finance and green technology innovation by constructing the green finance index while considering both the quality and quantity of innovation.
Findings
The study suggests that green finance is positively related to the quality and quantity of enterprise green technology innovation, while green finance is more effective in stimulating the quality of green technology innovation than quantity. In addition, alleviating financial mismatch and improving the quality of environmental information disclosure are core mechanisms during the process of green finance facilitating green technology innovation. Furthermore, green finance exerts a more positive effect on the quality and quantity of green technology innovation with large-size enterprises, heavily polluting industries and enterprises in the eastern region.
Originality/value
This paper enriches the literature on green finance and green technology innovation and provides practical significance for green finance implementation.
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Rick D. Hackett and Gordon Wang
The purpose of this paper is to bring definitional clarity to the term “virtue” as pertinent to the behavioural sciences literatures on leadership; to identify a short and…
Abstract
Purpose
The purpose of this paper is to bring definitional clarity to the term “virtue” as pertinent to the behavioural sciences literatures on leadership; to identify a short and consolidated list of cardinal virtues commonly associated with leadership effectiveness; to provide a model relating leader virtues to leader outcomes (i.e. ethics, happiness, life satisfaction, and effectiveness); and to propose a program of research.
Design/methodology/approach
The authors systematically and comprehensively review Aristotelian and Confucian literatures on virtue ethics, and the literatures on seven leadership styles – i.e. moral, ethical, spiritual, servant, transformational, charismatic, and visionary leadership.
Findings
Six virtues, including four considered cardinal by Aristotle (courage, temperance, justice and prudence), and two considered cardinal by Confucius (humanity, and truthfulness), were common to all seven leadership styles.
Research limitations/implications
Researchers should aim to develop and validate a measure of virtuous leadership based on the six cardinal virtues presented here and also to test both the proposed measurement and structural models.
Practical implications
The authors' recommended program of research will ideally inform development and design of selection and training programs for enhancing virtuous leadership.
Originality/value
The authors provide definitional clarity to the term “virtue” – one that is well grounded in the moral philosophy and virtue ethics literatures; consolidate vast and varied literatures on seven different widely subscribed leadership styles and identify six cardinal virtues most likely to positively impact leadership effectiveness; present an organizing framework, structural model, and research agenda to catalyze research on virtuous leadership.
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Haibo Xue, Xin Zhao, Pokachev Nikolay and Jiayi Qin
Family dinner on Lunar New Year's Eve is the most important and most ritualized feast for families in China. It is the time for the entire family to reunite. Families gather…
Abstract
Purpose
Family dinner on Lunar New Year's Eve is the most important and most ritualized feast for families in China. It is the time for the entire family to reunite. Families gather together to reflect their past and talk about the future. Through the lens of consumer culture theories, this study explores how Chinese consumers construct family identity.
Design/methodology/approach
Based on constant comparative analysis of primary data including in-depth interviews and participant observation, and secondary data including historical archives, cultural tracing, documentary reports and essays, the authors deconstruct the consumption rituals of family dinner on Chinese Lunar New Year's Eve. The authors focus on four aspects, including participants, place, time and related activities, and analyze Chinese consumers' ritual experiences.
Findings
The authors’ findings show how young consumers construct and strengthen individual self-identity, relational identity and family identity in various ways through consumption and ritual practices during Chinese Lunar New Year celebration.
Originality/value
The study of family dinner on Lunar New Year's Eve helps the authors understand contemporary consumer culture in three aspects. First, it helps the authors understand the relationship between consumption and culture. Second, the study shows the changes and continuities of consumption rituals. Third, the research highlights the experience of “home” among contemporary Chinese consumers.