氢同位素在氧化铝弥散强化铜合金中的渗透滞留行为研究  

Hydrogen Isotope Permeation and Retention in Alumina Dispersion Strengthened Copper Alloys

作　　者：安仲庆 周海山[2] 徐玉平[2] 刘凤[2] 戚强[2] 汪京[2] 李小椿 卢焘[1,2] 罗广南[1,2,3,4] 

机构地区：[1]中国科学技术大学核科学技术学院,合肥230027 [2]中科院合肥物质科学研究院等离子体物理研究所,合肥230031 [3]合肥物质科学技术中心,合肥230022 [4]中国科学院合肥大科学中心,合肥230022

出　　处：《现代应用物理》2015年第4期299-304,共6页Modern Applied Physics

基　　金：国家自然科学基金资助项目(11405201)

摘　　要：氧化铝弥散强化铜合金是国际热核实验堆（ITER）的备选热沉材料之一,氘在其中的渗透滞留行为关系到ITER运行的安全性。通过气体驱动渗透平台测定了实验温度621~803 K时氘气在氧化铝弥散强化铜合金中的渗透参数;通过热脱附谱实验平台记录了2种氧化铝弥散强化铜合金以及CuCrZr的热脱附曲线。结果表明：在相同温度区间内,氘气在氧化铝弥散强化铜合金中的渗透系数与纯铜及CuCrZr接近,说明氧化铝弥散相对氘气在氧化铝弥散强化铜合金中的渗透系数基本没有影响,而扩散系数比在纯铜和CuCrZr中都低,且在低温时显著降低;2种氧化铝弥散强化铜合金均有3个脱附峰,而CuCrZr合金只有1个脱附峰。Alumina dispersion strengthened copper alloys have been selected as one of the candidate heat sink materials by ITER because of their high heat conductivity and high strength. The permeation and retention of tritium in the alloys warrant further investigation because they are related to the safety of ITER operation. In this paper, the deuterium per- meation parameters in the Al2O3 dispersion strengthened copper alloys have been experimen- tally evaluated at the temperature from 621 K to 803K, using a gas driven permeation device.The thermal desorption characteristics of two Al2O3 dispersion strengthened copper alloys and a CuCrZr alloy have been studied using a thermal desorption spectroscopy facility. The experimental results show that, at the same temperature, the deuterium permeability in the alloys is approximate to that in Cu and CuCrZr materials, indicating the Al2O3 dispersed phase does not affect the permeability in the alloys, while the diffusivity is lower compared with that in Cu and CuCrZr, especially at lower temperatures. Three desorption peaks have been observed for both Al2O3 dispersion strengthened copper alloys, but only one desorption peak has been observed for the CuCrZr alloy.

关 键 词：渗透 滞留 弥散铜 热脱附 

分 类 号：TL64[核科学技术—核技术及应用] TG146.1[一般工业技术—材料科学与工程]