LUO Meiqing CHEN Nianyi Shanghai Institute of Metallurgy
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Academia Sinica
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Shanghai
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ChinaYU Zhizhong Shanghai Institute of Testing Technics
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Shanghai
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ChianNING Yuantao ZHOU Xinming Kunming Institute of Precious Metals
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Kunming
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China CHEN Nianyi
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Professor
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Shanghai Institute of Metallurgy
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Academia Sinica
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Shanghai 200050
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China
金属学报(英文版)
The electronic structure of Pd-Y-Si glass has been investigated by ESCA and quantum chem- ical calculation.It was found that the valence electrons of Y transferred to Si atoms in this metallic glass,forming polar covalent bonds.Perhaps these strong covalent bonds link Si and Y atoms to form clusters...
关键词:
Pd-Y-Si glass
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YONG Qilong LI Yongfu Yunnan Institute of Technology
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Kunming
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ChinaSUN Zhenbao WU Baorong Central Iron and Steel Research Institute
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Ministry of Metallurgical Industry
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Beiiing
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China YONG Qilong
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Department of Mechanical Engineering
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Yunnan Institute of Technology
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Kunming
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China
金属学报(英文版)
According to the misfitting dislocation theory,a method of theoretical calculation was devel- oped for the specific energy of the semicoherent interface between microalloy carbonitrides and austenite matrix.The calculating formulae were derived and the results were satisfactorily applied on the rese...
关键词:
specific interfacial energy
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By FENG Benzheng YANG Deqing Institute of Precious Metals
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Kunming
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650221
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Yunnan
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China.Physics Department
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Yunnan University
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Kunming
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China.To whom correspondence should be addressed.
材料科学技术(英文)
The work functions before and after crystallization of two glassy alloys,Pd_(83.5)Si_(16.5) and Cu_(70)Ti_(30) have been measured by means of the con- tact potential difference method in the secondary electron field at room temperature under 10~(-5) Pa vacuum.The results show that the work functions...
关键词:
work function
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LU Yuehua Kunming Institute of Precious Metals
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Kunming
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ChinaLIU Chunpeng Kunming Institute of Technology
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Kunming
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China Research Assistant
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Laboratory No.1
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Kunming Institute of Precious Metals
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Kunming 650031
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China
金属学报(英文版)
Reaction between Cu_2S and Cu_2O was investigated at 1150 to 1250℃.The reaction rate in- creases with the increase of surface area of Cu_2O grains and depends unobviously on temper- ature.At the suggestion of controlling step of reaction rate being oxygen diffusion through the liquid layer along rea...
关键词:
Cu_2O
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NING Yuantao Institute of Precious Metals
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Kunming
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China Associate Professor
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Institute of Precious Metals
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Kunming
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Yunnan
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China
金属学报(英文版)
A criterion of the metastable extension of solid solubility was proposed.When the eutectic concentration arm ratio parameter of an alloy,J>10,the hypereutectic extension and the metastable solid solubility limit beyond eutectic concentration may be obtained.When J≤10, the hypoeutectic extension m...
关键词:
eutectic system
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LI Cheng Beijing Central Design and Research Institute for Non-Ferrous Metallurgical Industry
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Beijing
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ChinaLIU Chunpeng
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Kunming Institute of Technology
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Kunming
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China LI Cheng
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Metallurgical Dept.No.l
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Beijing Central Design and Research Institute for Non-Ferrous Metallurgical Industry
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Beijing 100038
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China
金属学报(英文版)
The rate equation of reaction between PbS and PbO is dα/dt=kx_(PbS)~3 x_(PbO)~(-2).A transition product, PbSO_4·2PbO,is found by X-ray diffraction analysis.The reaction mechanism was dis- cussed on the basis of electron transfer....
关键词:
kinetics
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LIU Rixin NING Baolin ** Dept.of Metallurgy
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Kunming Institute of Technology
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Kunming
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650093
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China*** Dept.of Thermal Energy
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Northeast University of Technology
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Shenyang
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110006
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China+ To whom correspondence should be addressed
材料科学技术(英文)
This paper provides a mathematical model for the billet reheating process in furnace.A new optimum method is brought up that the objective function is the integral value of enthalpy increasing process of a billet.Different delays are simulated and calculated,some proper delay strategies are ob- tain...
关键词:
reheating furnace
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NING Yuantao LI Yongnian Kunming Institute of Precious Metals
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Kunmmg
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China Professor
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Kunming Institute of Precious Metals
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Kunming
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Yunnan
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China
金属学报(英文版)
The internal oxidation behavior of Pd-40Ag-1M(M=Zr,Y)alloy wires has been studied in air at 800—1200℃.The relationship between the internal oxidation depth ξ and the reaction time t can be expressed as ξ= Kt~n,where n=0.5—0.75.The higher the temperature,the larger the value of n is.The active elemen...
关键词:
Pd-40Ag alloy
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NING Yuantao LI Yongnian Kunming Institute of Precious Metals
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China Ning Yuantao
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Professor
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Institute of Precious Metals
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Kunming
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Yunnan
,
China
金属学报(英文版)
The influence of rare-earth elements,La,Ce,Pr,Nd,Sm,Eu,Gd,Dy,Ho,Er and Yb on the thermal stability of PdSi_(16.5) glass was studied systematically by means of DSC.All rare-earth elements,especially heavy ones,increase obviously the thermal stability parameters,including T_θ(T_g ,T_x ,T_g),T_(rg) and...
关键词:
thermal stability
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