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Coating behavior and surface hardening of Pd_(77)Cu_6Si_(17) thin film metallic glass on AZ31 magnesium alloy

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第12期14卷 898-905页

作者： X.H.DU y.C.CHANG H.J.PEI b.y.chen M.C.KUO J.C.HUANG School of Materials Sciences and Engineering Shenyang Aerospace University Department of Materials and Optoelectronic Science National Sun Yat-Sen University Department of Materials Engineering Kun Shan University

Pd77Cu6Si17(PCS) thin film metallic glasses(TFMGs) with high glass forming ability and hardness were selected as a hard coating for improving the surface hardness of AZ31 magnesium alloy. both microindentation and nanoindentation tests were conducted on specimens with various PCS film thicknesses from 30 to 2000 nm. The apparent hardness and the relative indentation depth(β) were integrated using a quantitative model. The interaction parameters involved and relative hardness values were extracted from iterative calculations. According to the results, surface hardness can be enhanced greatly by PCS TFMGs in the shallow region, followed by gradual decrease with increasing β ratio. In addition, specimens with thinner coatings(e.g., 200nm) showed greater substrate-film interaction and those with thick coatings(e.g., 2000nm) became prone to film cracking. The optimum TFMG coating thickness in this study was estimated to be around 200 nm.

关键词： Thin film metallic glass(TFMG) Magnesium alloy Sputtering process Nanoindentation Coating thickness

Raman Scattering Study of ND_(4)^(+)-Ion Motion and Structural Phase Transitions in(ND_(4))_(2)PbCl_(6)

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Chinese Physics Letters 1996年第5期13卷 394-396页

作者： SHI Jin-rong XU yong-chen y.Kume b.Arnscheidt J.Pelzl WU Xiang Pohl Institute of Solid State Physics Tongji UniversityShanghai 200092 Faculty of General Education Azabu UniversityFuchinobeSagatniharaKanagazva 229Japan Institut fur ExperimentalphysikⅢ AG Festkorperspektroskopie y Ruhr-Universitat Bochum44780 BochumGermany International Center for Materials Physics Chinese Academy of SciencesShenyany 110015

Rams spectra of the internal modes of ND^(+)_(4)-ion in (ND_(4))_(2)PbCl_(6) crystal have been recorded in the temperature range of 5-300 K.A new structural phase tratisition was observed at 34 K be-ca-use of deuterium *** behaviours of the internal modes of the ND 4-ion at this temperature show that the structural transition is one of first order.

关键词： effect. (4) Transition

Ramanujan-type congruences for broken 2-diamond partitions modulo 3

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Science China Mathematics 2014年第8期57卷 1553-1560页

作者： chen William y.C. FAN Anna R.b. yU Rebecca T. Center for Applied Mathematics Tianjin University Center for Combinatorics LPMC-TJKLC Nankai University

The notion of broken k-diamond partitions was introduced by Andrews and ***△k(n)denote the number of broken k-diamond partitions of *** and Paule also posed three conjectures on the congruences of△2(n)modulo 2,5 and *** and Sellers proved the conjectures for modulo 2,and Chan proved the two cases of modulo *** the case of modulo 3,Radu and Sellers obtained an infinite family of congruences for△2(n).In this paper,we obtain two infinite families of congruences for△2(n)modulo 3 based on a formula of Radu and Sellers,a 3-dissection formula of the generating function of triangular number due to berndt,and the properties of the U-operator,the V-operator,the Hecke operator and the Hecke *** example,we find that△2(243n+142)≡△2(243n+223)≡0(mod 3).The infinite family of Radu and Sellers and the two infinite families derived in this paper have two congruences in common,namely,△2(27n+16)≡△2(27n+25)≡0(mod 3).

关键词： broken k-diamond partition modular form Ramanujan-type congruence Hecke eigenform

Skeletal muscle-specific bambi deletion induces hypertrophy and oxidative switching coupling with adipocyte thermogenesis against metabolic disorders

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Science China Life Sciences 2025年

作者： Xiangping yao Xudong Mai ye Tian yifan Liu Guanghui Jin Ze Li Shujie chen Xiaoshuang Dai Liujing Huang Zijing Fan Guihua Pan Xiaohan Pan Xiangmin Li Michael C yu Jia Sun Jingxing Ou Hong chen Liwei Xie College of Life and Health Sciences Guangdong Industry Polytechnic Department of Endocrinology and Metabolism Zhujiang Hospital Southern Medical University State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application Guangdong Open Laboratory of Applied MicrobiologyInstitute of Microbiology Guangdong Academy of Sciences Institute of Aging Research Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics School of Medical Technology Guangdong Medical University Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital Organ Transplantation Institute Sun Yat-sen University Organ Transplantation Research Center of Guangdong ProvinceGuangdong province engineering laboratory for transplantation medicine Guangdong Provincial Key Laboratory of Liver Disease Research School of Public Health Xinxiang Medical University bGI Institute of Applied Agriculture BGI-Shenzhen Department of Applied biology and Chemical Technology The Hong Kong Polytechnic University Department of biological Sciences State University of New York at Buffalo Department of Internal Medicine Shunde Women and Children's Hospital (Maternity and Child Healthcare Hospital of Shunde Foshan) Guangdong Medical University

Skeletal muscle plays a significant role in both local and systemic energy metabolism. The current investigation aims to explore the role of the bambi gene in skeletal muscle, focusing on its implications for muscle hypertrophy and systemic metabolism. We hypothesize that skeletal muscle-specific deletion of bambi induces muscle hypertrophy, improves metabolic performance, and activates thermogenic adipocytes via the reprogramming of progenitor of i WAT, offering potential therapeutic strategies for metabolic syndromes. Leveraging the Chromatin immunoprecipitation(ChIP)-seq and bioinformatics analysis, bambi gene is shown to be a direct target of HIF2α, which is further confirmed by ChIP-qPCR and promoter luciferase assay. Skeletal muscle-specific bambi deletion led to significant muscle hypertrophy and improved metabolic parameters, even under high-fat diet conditions. This deletion induced metabolic reprogramming of stromal vascular fractions(SVFs) into thermogenic adipocytes, contributing to systemic metabolic improvements, potentially through the secretory ***, mice with skeletal muscle-specific bambi deletion demonstrate resistance to high-fat diet-induced metabolic disorders, highlighting a potential therapeutic pathway for metabolic syndrome management. Thus, skeletal muscle-specific deletion of bambi triggers muscle growth, enhances metabolic performance, and activates thermogenic adipocytes. These findings suggest bambi as a novel therapeutic target for metabolic syndromes, providing new insights into the interaction between muscle hypertrophy and systemic metabolic improvement. The study underscores the potential of manipulating muscle physiology to regulate whole-body metabolism, offering a novel perspective on treating metabolic disorders.

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Plastic Strain Energy Model for Rock Salt Under Fatigue Loading

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Acta Mechanica Solida Sinica 2018年第3期31卷 322-331页

作者： M.M.He N.Li b.Q.Huang C.H.Zhu y.S.chen Institute of Geotechnieal Engineering Xi'an University of TechnologyXi'an 710048China State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi'an University of TechnologyXi'an 710048China College of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650500China Shaanxi Key Laboratory of Loess Mechanics and Engineering Xi'an University of TechnologyXi'an 710048China

The fatigue test for rock salt is conducted to investigate the effects of stress ampli- tude, loading frequency and loading rate on the plastic strain energy, from which the evaluation rule of the plastic strain energy is analyzed, which is divided into three stages： cyclic hardening, saturation and cyclic softening. The total accumulated plastic strain energy only depends on the mechanical behavior of rock salt, but is immune to the loading conditions. A novel model for fatigue life prediction is proposed based on the invariance of the total plastic dissipation energy and the stability of the plastic energy per cycle.

关键词： Rock salt Fatigue life Plastic energy

Effects of boron Addition on Grain Refinement in TiAl-based Alloys

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Journal of Materials Science & Technology 2010年第7期26卷 639-647页

作者： W.D. Wang,y.C. Ma,b. chen,M. Gao,K. Liu and y.y. Li Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [a] Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Solid state phase transformation characteristics of the body centred β（Ti） into the hexagonal closed packed α（Ti） in Ti45AI8Nb-（0, 0.3, 0.5 and 0.8 at. pct） b alloys were investigated by heat treatment to clarify γ/α2 lamellar microstructure refinement induced by b addition. Experimental results confirmed two kinds of boron-reduced grain refinement mechanisms through refining either/β phase then α phase （β-refinement） or α phase directly （α-refinement） to refine lamellar microstructure at room temperature; however, the role of α-refinement dominated the as-cast alloy. It was also found that during the lamellar microstructure refinement β-refinement the convoluted flake over β-refinement in Ti45Al8Nbxb and plate-like borides along β grain boundaries assisted nucleation of α phase, and the particle-like borides nearβ grain boundaries impeded α phase growth.

关键词： Titanium aluminides Phase transformation Microstructure

Improved mechanical properties of SiC fiber reinforced silica-based ceramic cores fabricated by stereolithography

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Journal of Materials Science & Technology 2022年第21期116卷 161-168页

作者： W.Zheng J.M.Wu S.chen K.b.yu J.Zhang y.S.Shi State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of EducationWuhan 430074China

Silica-based ceramic cores have been widely used to fabricate aero-engine hollow blades due to their moderate high temperature mechanical properties and excellent *** this study,silica-based ceramics with SiC fiber addition were prepared via stereolithography,and the influence of SiC fiber content on mechanical properties of the obtained silica-based ceramics was *** the increase of SiC fiber content,linear shrinkage gradually decreased,while room temperature flexural strength and high temperature flexural strength first increased and then *** SiC fiber content increased to 4.0 wt%,linear shrinkage was reduced to 0.62%resulting from the oxidation of ***,room temperature flexural strength was improved from 11.79 MPa to 23.83 MPa and high temperature flexural strength was enhanced from 15.64 MPa to 34.62 MPa with 4.0 wt%SiC fiber addition due to the reinforcement of fibers and the enhancedβ-cristobalite content,which meets the need of ceramic ***,it demonstrates the capability of fabricating high-performance and high-precision silica-based ceramic cores reinforced by SiC fibers via stereolithography for rapid manufacturing of hollow blades.

关键词： Silica-based ceramic cores Stereolithography SiC fiber Mechanical properties Hollow blades

Effects of Λ hyperons on the deformations of even–even nuclei

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Chinese Physics C 2022年第6期46卷 212-218页

作者： C.F.chen Q.b.chen Xian-Rong Zhou y.y.cheng Ji-Wei Cui H.-J.Schulze Department of Physics East China Normal UniversityShanghai 200241China School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China INFN Sezione di Catania Dipartimento di FisicaUniversitádi CataniaVia Santa Sofia 6495123 CataniaItaly

The deformations of multi-Λ hypernuclei corresponding to even-even core nuclei ranging from^(8)be to^(40)Ca with 2,4,6,and 8 hyperons are studied using the deformed Skyrme-Hartree-Fock *** is found that the deformations are reduced when adding 2 or 8 Λ hyperons,but enhanced when adding 4 or 6 Λ *** differences are attributed to the fact that Λ hyperons are filled gradually into the three deformed p orbits,of which the [110] 1/2^(-)orbit is prolately deformed and the degenerate [101]1/2^(-)and [101]3/2^(-)orbits are oblately deformed.

关键词： deformation even-even nuclei effects of hyperon(s)

Data-driven evaluation of fatigue performance of additive manufactured parts using miniature specimens

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Journal of Materials Science & Technology 2019年第6期35卷 1137-1146页

作者： H.y. Wan G.F. chen C.P. Li X.b. Qi G.P. Zhang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 China Materials Manufacturing Qualification Group Corporate Technology Siemens Ltd. China Beijing 100102 China State Key Laboratory of Tribology Tsinghua University Beijing J00084 China

This overview firstly introduces the state-of-the-art research progress in length scale-related fatigue performance of conventionally-fabricated metals evaluated by miniature specimens. Some key factors for size effects sensitive to microstructures including the specimen thickness, grain size and a ratio between them are highlighted to summarize some general rules for size effects. Then, ongoing research progress and new challenges in evaluating the fatigue performance of additive manufactured parts controlled by location-specific defects, microstructure heterogeneities as well as mechanical anisotropy using miniature specimen testing technique are discussed and addressed. Finally, a potential roadmap to establish a data-driven evaluation platform based on a large number of miniature specimen-based experiment data,theoretical computations and the ’big data’ analysis with machine learning is proposed. It is expected that this overview would provide a novel strategy for the realistic evaluation and fast qualification of fatigue properties of additive manufactured parts we have been facing to.

关键词： Additive manufacturing Miniature specimen Fatigue Size effect Location-specific Data analysis