金钯铁合金的K状态研究  

Study on the K-state of Au-Pd-Fe alloy

作　　者：柴园 武海军[1] 马丽华 张健康[1] 李强[1] 柳青[1] 戴华[1] CHAI Yuan;WU Haijun;MA Lihua;ZHANG Jiankang;LI Qiang;LIU Qing;DAI Hua(Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China)

机构地区：[1]昆明贵金属研究所,贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2017年第4期30-33,共4页Precious Metals

基　　金：云南省科技创新人才计划项目(2015HC034);云南省应用基础研究重大项目(2016FC006);国家自然科学基金(U1202273,51501075);云南省院所技术开发专项(2014DC018)

摘　　要：K状态是一种特殊的有序化转变,其形成会影响合金的力学性能和电学性能。Au-35Pd-8Fe合金在高温时为单相固溶体,热处理时会发生原子重排形成偏聚。采用硬度、XRD、热电阻等检测方法对Au-35Pd-8Fe合金固溶态和时效态进行分析。结果表明,该成分合金存在K状态,K状态转变温度范围为450~500℃,在该温度范围内合金电阻迅速升高并达到峰值。K-state is a special kind of order transformation. It will affect mechanical and electrical properties of a metal alloy. Au-35Pd-8Fe alloy is in a state of single-phase solid solution at a high temperature, and the segregation is produced due to the atomic rearrangement when the alloy undergoes heat treatment. A series of tests including hardness, XRD and thermal resistance were performed to analyze Au-35Pd-8Fe alloy in a solution state and in an aging state. The results show that the alloy after aging treatment exists in K-state. The temperature required for the K-state transition is from 450 to 500℃. In this temperature range, the heat resistance of the alloy rises rapidly and will reach the peak value.

关 键 词：金属材料 K状态 金钯铁合金 热电阻 原子偏聚 

分 类 号：TG111.5[金属学及工艺—物理冶金]