浸渗法合金化纯钨表层的研究  

Study on Infiltration Alloying of Tungsten Surface

作　　者：杨宗辉[1,2] 沈以赴[1,3] 孟氢钡[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京211106 [2]南京工程学院材料工程学院,南京211167 [3]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《材料工程》2012年第7期86-91,共6页Journal of Materials Engineering

基　　金：江苏省自然科学基金资助(BK2007201);江苏科技大学先进焊接技术省级重点实验室开放研究基金资助课题(JSAWT-06-02);南京工程学院校级科研基金(QKJA2009004)

摘　　要：采用浸渗Ni-Fe熔体法,使纯钨形成一定深度的W-Ni-Fe合金化表层,研究不同浸渗时间下合金化表层的深度变化与显微组织特征。结果表明:浸渗10～40min对应的合金化表层均由W相与含一定W原子的富Ni-Fe黏结相构成。浸渗10min和20min时,对应的合金化表层深530μm和700μm,黏结相非常细小,且分散嵌于W相之间;浸渗30min和40min时,对应的合金化表层深750μm和770μm,在深约60μm的浅表内,黏结相明显增大,部分W相呈圆滑颗粒态。结合实验结果及W-Ni二元合金相图,分析了合金化表层的形成机制。W-Ni-Fe alloying layer on tungsten was prepared by infiltration Ni-Fe melt. The micro- structures and the depths of alloying layer with different infiltration holding time were analyzed. Re- suits showed that W-Ni-Fe alloying layer depths were 530μm and 700μm when the infiltration holding time was 10min and 20min, and the NiFe-rich phase region embedded in tungsten phase was very small. When the infiltration holding time increased to 30rain and 40min, the W-Ni-Fe alloying layer depths were 750μm and 770μm, the NiFe-rich phase region significantly enlarged, and the shape of partial tungsten phase became spheroid. The forming mechanism of W-Ni-Fe alloying layer on tung- sten was explained based on experimental results and W-Ni phase diagram.

关 键 词：钨 浸渗 面向等离子体材料 合金化 

分 类 号：TG146.411[一般工业技术—材料科学与工程]