摘要
X射线衍射、透射电镜衍射及能谱分析表明 ,共渗初期渗层主要由Fe2 B相组成 ,加稀土后检测到了 (RE0 .6 5,Fe0 .35) 2 3B6 化合物 ;共渗4h渗层主要由Fe2 B相 +少量FeB相级成 ,在加入稀土后的硼铝共渗层中 ,检测到了稀土化合物 (Fe0 .8,RE0 .2 ) 6 B ,发现α Fe的晶面间距有所增大。对硼化物的形成进行了分析 ,由于Al,C ,稀土等化合物的形成阻碍了位错的运动 ,稀土的晶界强化、位错强化和固溶强化是加入稀土后硼铝共渗层性能提高的主要原因。
It was indicated that the initial layer of RE B Al permeation was mainly composed of Fe 2B by means of TEM and EDAX, and (RE 0.65 , Fe 0.35 ) 23 B 6 was found only after RE was added. The permeation layer was chiefly composed of Fe 2B and less FeB after permeating for 4 h. (Fe 0.8 , RE 0.2 ) 6B was found in the layer of RE B Al permeation and the distance of crystal plane of α Fe was enlarged. The mechanism of formation of boride was analyzed. Formation of compounds from Al, C and RE prevents the dislocation movement, and the strengthening effect of RE in grown boundary, dislocation and solid solution is the main reason of performance improvement for permeation layer.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2000年第1期27-30,共4页
Journal of the Chinese Society of Rare Earths
基金
哈尔滨市留学归国人员基金! ( 93 71 2 1 80 0 6)资助
关键词
硼铝共渗
相组成
稀土元素
渗层
rare earths
B Al permeation
phase composition
strengthening
