材料期刊网

Co-Ga二元系β相正电子湮没的研究

黄懋容 , 殷定贞 , 曹玔 , 张玉苓

金属学报

<正> 在Co-Ga二元系中,β相的理想成分CoGa在室温的单相均匀范围为36.3—59.8at.-％Ga,它属于立方晶系的CsCl型结构,其点阵常数随Ga成分而变化,在接近理想成分的48at.-％Ga处有一最大值。在富Co端,为替代式固溶体。因为Co原子半径比Ga小,所以可以用原子半径大小来解释其实验现象。但在理想成分的富Ga一端,如果也属于替代式固溶体,则随着Ga含量的增加,点阵常数应增加,但实验的结果与此相反,因此文

关键词: Co-Ga二元系 , β-phase , positron annihilation , solid solution

ON THE ORDERING TRANSFORMATIONS IN Ti_3AL-Nb ALLOY

LI Dong ZHOU Jing CHANG Xin GUAN Shaoxuan Institute of Metal Research , Academia Sinica , Shenyang , China

金属学报(英文版)

Study was made of the behaviour of ordering transformation in Ti_3AI-Nb alloy,including the ordering at high temperatures,the transformation of high temperature β-phase during cooling,and the decomposition of metastable β-phase during aging.The results show that the ordered primary α_2 and high temperature β in alloy form at 1060℃.The transformation of high temperature β-phase proceed by β→α_2+ω type during cooling,and the decomposition of metastable β and ω type proceeded by(β+ω)_(metustabte)→(α_2+β)_(stable)during aging at 700℃.

关键词: Ti_3Al-Nb alloy , null , null , null , null

Internal Friction in a Shape Memory Alloy Cu-Zn-Al under Equilibrium Condition

ZHAO Zengqi , CHEN Feixia , LI Ximeng , YANG Dazhi Dalian University of Technology , China.

材料科学技术（英文）

关键词: CuZnAl alloy , null , null , null