有序的PdY合金的显微组织  

Microstructure of Ordered Pd 8t% Y Alloys

作　　者：曾立英[1] 袁弘鸣[1] 白保良[1] 李士江[1] 

机构地区：[1]西北有色金属研究院钛合金研究所,西安710016

出　　处：《金属热处理》1999年第10期7-9,共3页Heat Treatment of Metals

摘　　要：本文观察了两种成分的钯钇合金，Ｐｄ（７－５～８．０）％ Ｙ（原子分数，下同）和Ｐｄ（８．０～８．５） ％ Ｙ的显微组织结构。将Ｐｄ粉和Ｙ粉在真空感应电炉中熔炼成成分合格的合金铸锭，经９５０℃×６ｈ 真空均匀化处理后，制成厚为０－０１９ｍ ｍ 的箔材，然后施行不同的热处理。利用光学、透射电子显微镜观察其组织与微观结构。结果表明，经退火的钯钇合金中存在有序相，出现了反相畴界。有序态的Ｐｄ８ ％ Ｙ合金将比无序态的透氢速率高。Microstructures of palladium yttrium alloys have been investigated in this paper.The two alloys are Pd 7.52%Y alloy and Pd 8.22%Y alloy respectively.The Pd Y alloy ingots are prepared by melting the yttrium powder(purity,99.9%)and palladium powder (purity,99.98%) in a vacuum induction furnace.The resultant alloy covered by Ti foil is then homogenized in a vacuum annealing furnace at 950℃ for 6 hours.The materials are then coldly rolled to produce foil,of which the thickness is 0.019mm.Some of them are quenched into water from 900℃,920℃,940℃.Finally it is given an anneal in a vacuum annealing furnace at 750℃ for 40 minutes and is then cooled in furnace to produce the material in long range ordered(LRO) condition.Microstructures were determined by using optical and transmission electron microscopy respectively.The results indicate that order phase and anti phase domain boundary exist in the alloys after annealing.The hydrogen permeability of ordered Pd 8%Y is higher than that of disordered one.

关 键 词：钯钇合金 显微组织 有序态 核反应堆 透氢速率 

分 类 号：TL341[核科学技术—核技术及应用] TG146.36[一般工业技术—材料科学与工程]