Molecular dynamics simulations of computer have been performed on the local structure and bond orientation order of liquid metal Pb at 623 K,Results show that,at point near melting temperature,the local structures of ...Molecular dynamics simulations of computer have been performed on the local structure and bond orientation order of liquid metal Pb at 623 K,Results show that,at point near melting temperature,the local structures of liquid metal Pb show cubic symmetry,and the long-range correlation of this symmetry is weak.展开更多
Besed on the embedded atom method,molecular dynamics simulations have been performed on microdynamics behavior of liquid transition metal.Cu and Ni.Mean-square displacement,self-diffusion coefficient and velocity self...Besed on the embedded atom method,molecular dynamics simulations have been performed on microdynamics behavior of liquid transition metal.Cu and Ni.Mean-square displacement,self-diffusion coefficient and velocity self-correlation function have been calculated.In addition,effects of many body interactions have been discussed.展开更多
1.IntroductionSince the theory of spinodal decompo-sition in a supersaturated solid solution wasformulated by Hillert[1]and Cahn[2],thephenomena of spinodal decomposition havebeen found in many alloys.Tamura[3]haspoin...1.IntroductionSince the theory of spinodal decompo-sition in a supersaturated solid solution wasformulated by Hillert[1]and Cahn[2],thephenomena of spinodal decomposition havebeen found in many alloys.Tamura[3]haspointed out that spinodal decompositioncould also occur in maraging steels.A mod-ulated structure in 8Ni maraging steel was展开更多
Since the theory of spinodal decomposition in a supersaturated solid solution was formulated by Hillert and Chan, the phenomena of spinodal decomposition have been found in many alloys. We found a modulated structure ...Since the theory of spinodal decomposition in a supersaturated solid solution was formulated by Hillert and Chan, the phenomena of spinodal decomposition have been found in many alloys. We found a modulated structure in 10Ni maraging steel. Some investigators suggested that the formation of a modulated structure does not always imply the spinodal decomposition, and the modulated structure could also result from nucleation and growth.展开更多
SiC whisker reinforced aluminium alloy (SiCw/Al) composite is a kind of advanced material with high properties, and has been extensively studied since the 1980’s. Many researches have shown that the high SiC-Al inter...SiC whisker reinforced aluminium alloy (SiCw/Al) composite is a kind of advanced material with high properties, and has been extensively studied since the 1980’s. Many researches have shown that the high SiC-Al interface bond strength is the main reason for the high strength and modulus of the SiCw/Al composites. In the SiCw/Al composites made by powder metallurgy, there is no reaction in the SiC-Al interfaces, but there is element diffusion, so it is concluded that the diffusion bonding is the main reason for the high SiC-Al interface bond strength in the SiCw/Al composites. However, the study展开更多
基金Supported by the Laboratory of Rapidly Solidified Non-equilibrium Alloys,Institute of Metal Research,Academia Sinica.
文摘Molecular dynamics simulations of computer have been performed on the local structure and bond orientation order of liquid metal Pb at 623 K,Results show that,at point near melting temperature,the local structures of liquid metal Pb show cubic symmetry,and the long-range correlation of this symmetry is weak.
基金Supported by the Laboratory of Rapidly Solidified Non-equilibrium Alloys,Institute of Metal Research,Academia Sinica.
文摘Besed on the embedded atom method,molecular dynamics simulations have been performed on microdynamics behavior of liquid transition metal.Cu and Ni.Mean-square displacement,self-diffusion coefficient and velocity self-correlation function have been calculated.In addition,effects of many body interactions have been discussed.
文摘1.IntroductionSince the theory of spinodal decompo-sition in a supersaturated solid solution wasformulated by Hillert[1]and Cahn[2],thephenomena of spinodal decomposition havebeen found in many alloys.Tamura[3]haspointed out that spinodal decompositioncould also occur in maraging steels.A mod-ulated structure in 8Ni maraging steel was
基金Project supported by the National Natural Science Foundation of China.
文摘Since the theory of spinodal decomposition in a supersaturated solid solution was formulated by Hillert and Chan, the phenomena of spinodal decomposition have been found in many alloys. We found a modulated structure in 10Ni maraging steel. Some investigators suggested that the formation of a modulated structure does not always imply the spinodal decomposition, and the modulated structure could also result from nucleation and growth.
基金Project supported by the National Natural Science Foundation of China
文摘SiC whisker reinforced aluminium alloy (SiCw/Al) composite is a kind of advanced material with high properties, and has been extensively studied since the 1980’s. Many researches have shown that the high SiC-Al interface bond strength is the main reason for the high strength and modulus of the SiCw/Al composites. In the SiCw/Al composites made by powder metallurgy, there is no reaction in the SiC-Al interfaces, but there is element diffusion, so it is concluded that the diffusion bonding is the main reason for the high SiC-Al interface bond strength in the SiCw/Al composites. However, the study
