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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALUMINA COATINGS PLASMA-SPRAYED AT DIFFERENT SUBSTRATE TEMPERATURES

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Acta Mechanica Solida Sinica 2011年第5期24卷 461-466页

作者： Yazhe Xing Chaoping Jiang Hong Chen jianmin hao School of Materials Science and Engineering Chang＇an University Xi＇an 710064 China

Alumina coatings are prepared by atmospheric plasma spraying through controlling the substrate temperature during spraying. The changes in microstructure and mechanical properties of the coatings prepared at different substrate temperatures are examined. The hard-ness and the elastic modulus of the coatings are measured by indentation methods. The results show that interlamellar bonding in the coatings is significantly improved with increasing the substrate temperature. Moreover, long through-thickness columnar grains form in the coatings when the substrate temperature reaches above 430℃. As a result, the cross-sectional hardness and the elastic modulus perpendicular to the coating surface increase with increasing the substrate temperature.

关键词： plasma spraying alumina interlamellar bonding elastic modulus

X-RAY POWDER DIFFRACTION DATA AND STRUCTURAL REFINEMENT OF Er₃Co₆Sn₅

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中国有色金属学会会刊：英文版 1999年第1期9卷 88-90页

作者： He, Wei Zeng, Lingmin Qin, Wen Yan, Jialin hao, jianmin Univ of Science and Technology of China Hefei China

１ＩＮＴＲＯＤＵＣＴＩＯＮＲａｒｅｍｅｔａｌｓａｎｄｔｈｅｉｒｃｏｍｐｏｕｎｄｓｈａｖｅｏｕｔｓｔａｎｄｉｎｇｐｒｏｐｅｒｔｉｅｓａｎｄａｒｅｐａｉｄｉｎｃｒｅａｓｉｎｇａｔｅｎｔｉｏｎｔｏ．Ｎｕｍｅｒｏｕｓｉｎ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＲａｒｅｍｅｔａｌｓａｎｄｔｈｅｉｒｃｏｍｐｏｕｎｄｓｈａｖｅｏｕｔｓｔａｎｄｉｎｇｐｒｏｐｅｒｔｉｅｓａｎｄａｒｅｐａｉｄｉｎｃｒｅａｓｉｎｇａｔｅｎｔｉｏｎｔｏ．Ｎｕｍｅｒｏｕｓｉｎｖｅｓｔｉｇａｔｉｏｎｓｉｎｔｈｅ...

关键词： Er 3Co 6Sn 5 X ray powder diffraction Rietveld structural refinement

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面向新质生产力发展的东北营商环境优化研究

辽宁行政学院学报 2024年第2期 12-17页

作者：王诺斯郝建民石宇杰大连海事大学辽宁大连116026 大连财经学院辽宁大连116600 吉林外国语大学吉林长春130117

新质生产力是以科技创新为主的生产力,是符合我国经济高质量发展要求的生产力,它的提出对于东北经济社会发展具有特殊意义。在对新质生产力内涵深入剖析的基础上,从新质生产力创新逻辑、跃升逻辑、转型逻辑、绿色发展逻辑等方面阐释了... 详细信息

新质生产力是以科技创新为主的生产力,是符合我国经济高质量发展要求的生产力,它的提出对于东北经济社会发展具有特殊意义。在对新质生产力内涵深入剖析的基础上,从新质生产力创新逻辑、跃升逻辑、转型逻辑、绿色发展逻辑等方面阐释了营商环境优化与发展新质生产力之间的逻辑关系,提出面向新质生产力发展的东北营商环境优化实践路径,即形成鼓励生产力要素创新的营商服务理念、完善推动产业升级转型的高标准制度创新体系、建设实现效率变革的数字化营商服务平台和建立符合可持续绿色发展要求的资源投入治理机制。

关键词：新质生产力营商环境东北经济科技创新

维普期刊数据库博看期刊

Effects of Heat-treatment on Crystallization and Wear Property of Plasma Sprayed Fe-based Amorphous Coatings

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Journal of Wuhan University of Technology(Materials Science) 2013年第4期28卷 643-646页

作者：姜超平 XING Yazhe hao jianmin SONG Xuding School of Materials Science and Engineering Chang'an University Key Laboratory of Road Construction Technology and Equipment MOE Chang'an University

The Fe-based amorphous coatings were produced by air plasma spraying. The as-sprayed coatings were heat-treated at the temperature of 573, 873, and 1 023 K, respectively. The crystallization and wear behavior of the heat-treated amorphous coatings were investigated. It was found that the amorphous- nanocrystalline transformation appeared when the as-sprayed coatings were treated at 853 K. The crystallization process had completed and a coating with microcrystallines was formed when the treatment temperature reached 1 023 K. The resultant amorphous and nanocrystalline composite coatings exhibited superior wear resistance compared to crystalline coating. It is attributed to fine grain strengthening of formed nanocrystallines.

关键词： amorphous air plasma spraying crystallization heat-treatment

X-RAY POWDER DIFFRACTION STUDY FOR RE COMPOUND GdNiSn

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Transactions of Nonferrous Metals Society of China 1996年第1期6卷 51-53页

作者： Zeng Lingmin Zhuang Yinghong Li Junqin Zhang Liping hao jianmin Institute of Materials Science Guangjci University Nanning 530004 Tianjin Electronic Materials Research Institute Tianjin 300192

The compound GdNiSn has been studied by X-ray powder diffraction *** crystal structure and the X-ray diffraction data for this compound at room temperature are *** compound GdNiSn is orthorhombic with lattice parameters a=7.2044(1)A,b=7.6895(6)A,c=4.4772(4)A,space group Pna2_(1) and 4 formula units of GdNiSn in unit *** Smith and Snyder figure of index F_(30) for this compound is 35(0.015,59).

关键词： RE compound GdNiSn X-ray diffraction data crystal structure

X-RAY POWDER DIFFRACTION DATA AND STRUCTURAL PARAMETERS FOR RECOMPOUND NdCo_0.6Sb_2

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中国有色金属学会会刊：英文版 1997年第2期7卷 61-63页

作者： Zeng, Lingmin Wu, Shiwei Qin, Wen Zhang, Liping Yan, Jialin hao, jianmin Nong, Liangqin Guangxi Univ Nanning China

ＸＲＡＹＰＯＷＤＥＲＤＩＦＦＲＡＣＴＩＯＮＤＡＴＡＡＮＤＳＴＲＵＣＴＵＲＡＬＰＡＲＡＭＥＴＥＲＳＦＯＲＲＥＣＯＭＰＯＵＮＤＮｄＣｏ０．６Ｓｂ２①ＺｅｎｇＬｉｎｇｍｉｎ，ＷｕＳｈｉｗｅｉ，ＱｉｎＷｅｎ，ＺｈａｎｇＬｉ... 详细信息

ＸＲＡＹＰＯＷＤＥＲＤＩＦＦＲＡＣＴＩＯＮＤＡＴＡＡＮＤＳＴＲＵＣＴＵＲＡＬＰＡＲＡＭＥＴＥＲＳＦＯＲＲＥＣＯＭＰＯＵＮＤＮｄＣｏ０．６Ｓｂ２①ＺｅｎｇＬｉｎｇｍｉｎ，ＷｕＳｈｉｗｅｉ，ＱｉｎＷｅｎ，ＺｈａｎｇＬｉｐｉｎｇ，ＹａｎＪｉａｌｉｎ，Ｈａ...

关键词： RE compound NdCo 0.6 Sb 2 X ray diffraction data structural parameters

Mechanical Characterization of Close Cell Aluminum Foams Reinforced by High Voltages Electro-deposition

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Journal of Wuhan University of Technology(Materials Science) 2019年第3期34卷 541-548页

作者： XU Yiku YANG Lei SONG Xuding CHEN Yongnan PENG Xuan CHEN Yunzhou hao jianmin LIU Lin School of Material Science and Engineering Chang'an UniversityXi'an710064China Key Laboratory of Road Construction Technology and Equipment MOEChang'an UniversityXi'an710064China State Key Laboratory of Solidification and Processing Northwestern Polytechnical UniversityXi'an 710072China

The parameters for the electro-deposition of Cu were optimized in order to increase the compressive properties of close cell aluminum. Different values of deposition voltages and times were considered to vary the amount of deposited Cu. The surface morphology of the coating was observed by SEM and the compressive properties were evaluated by MTS. The results show that the coating is more homogeneous and compact with increasing voltage in a certain range, and beyond which, the coating quality decreases apparently. The reason is dedicated to the discharge rate of Cu2+ and nucleus formed in unit time. The compression results show three experienced stages: elastic deformation stage, collapse deformation stage and densification stage. After the electro-deposition of Cu, the elasticity modulus is increased obviously and the platform stress is also increased. Under the same strain, the stress of the aluminum foam with coating is reinforced comparing with the aluminum foam without coating. Furthermore, the platform area is widened apparently. In addition, Cu-SiC nanocomposite coatings are electrodeposited in alumium foams for further improving the mechanical characterization.

关键词： aluminum foam electro-deposition mechanical characterization

Corrosion Behavior of Cu/Ni Coatings on Ti-6Al-4V Alloy after Diffused Treatment

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Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 215-222页

作者：王楠陈永楠 LIU Shuangshuang ZHU Lixia 朱世东 Zhao Yongqing ZHANG Long hao jianmin ZHANG Zhen WU Zhicheng School of Materials Science and Engineering Chang’an UniversityXi’an 710064China CNPC Tubular Goods Research Institute Xi’an 710017China School of Materials Science and Engineering Xi’an Shiyou UniversityXi’an 710065China Northwest Institute for Nonferrous Metal Research Xi’an 710016China

To improve the low thermal conductivities and poor wear resistances of TC4(Ti-6Al-4V)alloy,the most widely used titanium alloy,the surface of TC4 alloys is modified by electroplating deposition of Ni and Cu layers,and then heat-treated to increase the diffusivity at the *** this paper,the corrosion behavior of Cu/Ni coatings on TC4 alloy at different heat treatment processes was investigated in 3.5 wt%Na Cl by the electrochemical analysis,and the microstructure and composition of corrosion products was carried out to reveal the corrosion resistance mechanism of Cu/Ni *** was found that the corrosion resistance was significantly influenced by heat treatment *** the increasing diffusion treatment temperature from 500 to 700℃,the corrosion potential positively shifted from-330.87 to-201.14 m V,and the corrosion current density decreased from 4.02×10^-3 to 0.514×10^-3 m A/cm^***,when heat treatment temperature increased to 800℃,the corrosion potential negatively shifted to-207.21 m V,and the current density increased to 1.62×10^-3 m A/cm^*** diffusion behavior of Ti,Ni and Cu elements occurred and small amounts of Ni and Ti elements appeared on the specimen surface under different heat treatment *** heattreated at 700℃,the smaller pore size,dense Cu2O film,and highly stable Ti O and Ni O oxide layer were formed,which dramatically enhanced the corrosion resistance of Cu/Ni ***,a novel model of corrosion resistance was proposed based on the analysis mentioned above.

关键词： Cu/Ni coatings corrosion behavior diffusion heat treatment

Effect of nitriding-sulfurizing composite treatment on the tribological behavior of titanium alloys

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Rare Metals 2010年第6期29卷 604-607页

作者： WANG Lijie,XING Yazhe,WANG Hongbo,and hao jianmin School of Materials Science and Engineering,Chang’an University,Xi’an 710064,China School of Materials Science and Engineering Chang’an University Xi’an China

A composite layer was prepared on the surface of Ti-6Al-4V alloy by nitriding-sulfurizing composite treatment,and its microstructure and phase structure were examined by scanning electron microscopy（SEM） and X-ray diffraction（XRD）,*** tribological performance was measured to investigate its dependence on the nitriding-sulfurizing composite treatment *** results indicated that the composite layer was mainly comprised of Ti2N,TiN,and *** was found that the composite layer exhibited superior tribological properties under dry friction and absolute sliding conditions due to the formation of sulfides with self-lubricating function.

关键词： titanium alloys surface treatment friction and wear ion nitriding sulfurizing