氢在镍基单晶高温合金中的扩散和溶解  

DIFFUSION AND SOLUBILIZATION OF HYDROGEN IN Ni-BASE SINGLE CRYSTAL SUPERALLOYS

作　　者：吴秋允[1] 张静华[1] 孙秀魁[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所快速凝固与非平衡合金国家重点实验室

出　　处：《金属学报》1996年第9期938-942,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：本工作采用超高真空气相渗透技术，在３００－４２０℃温度范围内，测定了氢在ＤＤ８，Ｒｅｎｅ＇Ｎ４两种单晶高温合金中的扩散系数、渗透率和溶解度常数，分析了缺陷对扩散系数的影响及氢溶解放热的原因．结果表明，在实验温度范围内，氢在两种单晶高温合金中的扩散系数，渗透率和溶解度常数均遵循Ａｒｒｈｅｎｉｕｓ关系，空洞不是造成氢溶解放热的原因．The diffusivity, permeability and solubility of hydrogen in DD8 and Rene'N4 superalloys were measured in the temperature range of 30t-420℃ by using ultrahigh vacuum gas permeation technique. The effect of defects on diffusivity and the reason of exothermic reaction of H-solubilization were analyzed. The results show that, in the testing temperature range, the diffusivity, permeability and solubility of hydrogen in DD8 and Rene'N4 superalloys are all in agreement with Arrhenius relationship, and the presence of voids is not the reason of exothermic reaction of H-solubilization.

关 键 词：单晶 高温合金 扩散系数 溶解度 镍基合金 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG132.32[金属学及工艺—金属材料]