摘要
利用Ｘ－射线衍射方法研究了４种不同淬火速度的Ｃｕ－１８Ｚｎ－１４Ａｌ合金马氏体结构及其有序化状态。随淬火速度的减慢．该合金次近邻（ｎｎｎ）有序度增强．而近邻（ｎｎ）有序度基本不变，其（１２Ｌ）与（２０Ｌ），（０４Ｌ）与（３２Ｌ或３２Ｌ）衍射峰对的分裂参数ρ＝｜ｓｉｎ２θ１－ｓｉｎ２θ２｜及单斜角β也变化甚微。此外，还根据该台金的晶体结构模型对其有序化状态进行了分析计算，认为ｎｎｎ有序增强时仅是Ｚｎ、Ａｌ原子沿ｂ轴发生交换．其对晶体对称性和晶格常数影响甚数．
The martensite structure and ordering state of Cu-18Zn-14Al alloy was studied by means of X-ray diffraction. which was subjected to 4 different quenching treatments. As quenching rate decreases, the nnn order degree of the alloy increases and the nn order degree almost remains unchanged. The spliting parameter ρ=|sin2θ1-sin2θ2| and the monoclinic angle βchanges very little. In addition,the ordering state of the alloy was calculated according to its crys-tal structure model. It is suggested that only the Zn and Al atoms exchanged along the b axis as the nnn order increased, which affected the crystal symmetry and the lattice constants very little.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1996年第3期58-65,共8页
Journal of Hefei University of Technology：Natural Science
基金
湖南省自然科学基金
