Cu-Cr合金中点阵参数的精确测定与真实固溶度估算  

Precise Determination of Lattice Parameters and Estimation of the True Solubility in Cu-Cr Alloy

作　　者：李强[1,2] 马彪[2] 李雷[2] 黄国杰[1] 陈春玲[2] 谢水生[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088 [2]河南理工大学,河南焦作454000

出　　处：《稀有金属材料与工程》2011年第S2期132-134,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50704006);河南省教育厅基金(2008B430009)

摘　　要：采用气雾化制粉法制备一系列不同固溶浓度的Cu-Cr合金粉体,对样品进行X射线衍射分析,XRD图谱采用纳尔逊外推函数(sin1θ+θ1)cos2θ/2进行图解外推,求得合金粉体的点阵参数。实验发现制备Cu-Cr合金在一定成分范围内,固溶度与点阵参数的变化呈良好线性关系,吻合校正后的Vegard定律。测量了实验条件下Cr在Cu中的固溶度范围,分析固溶度扩展的原因,讨论固溶度的扩展极限,提出用XRD测定Cr在Cu中真实固溶度的方法及计算公式。Cu-Cr alloy powders with different solid solubility were prepared by a spraying method. XRD patterns of Cu-Cr alloy powders were studied. Lattice parameters were determined by Nelson extrapolation function (sin1θ+θ1)cos2θ/2. A linear law between the solubility and lattice parameter was concluded when the contents of Cr ranged from 0.22at% to 1.55at%. The results agree well with Vegard's law. The solubility of Cr in Cu was measured. The reason of the extent of solubility was analyzed and the limit of solubility was discussed. A method was suggested to measure the true solubility of Cr in Cu, and the corresponding analysis formula is present to predict the of the true solubility.

关 键 词：Cu-Cr合金粉体 固溶度 点阵参数 Vegard定律 

分 类 号：TG146.11[一般工业技术—材料科学与工程]