摘要
用熔炼后均匀化退火的方法制备了Sm2(Fe,W)17母合金,然后于200～700℃、0.1MPa氢气压下保温1h进行氢化-歧化处理。研究了Sm2(Fe,W)17合金在氢化-歧化过程中的相变行为及W含量对Sm2(Fe,W)17合金氢化-歧化特性的影响。结果表明,Sm2(Fe,W)17在200℃、0.1MPa的H2气氛下吸氢形成Sm2Fe17Hx相,基体晶格膨胀,产生穿晶和沿晶断裂而破碎,W含量越高则合金吸氢越少。当温度高于600℃后,合金发生歧化反应,Sm2Fe17Hx相逐渐分解为SmHx和α-Fe;温度升至700℃后,W含量不同的Sm2(Fe,W)17合金歧化完成程度各异,W含量越少歧化越完全。
Sm2（Fe,W）17 master alloy was prepared by melting combined with a heattreating. Then hydrogenation-disproportionation was carried out at a temperature range of 200-700℃ and a H2 presure of 0.1MPa for 1 h. The evolution of the phase compositions in Sm2（Fe,W）17 alloys during the hydrogenation-disproportionation process, and the effect of W content on the hydrogenation-disproportionation process of Sm2（Fe,W）17 alloys were systematically studied. The result indicated that, Sm2（Fe,W）17 ingot absorps hydrogen and as a result Sm2Fe17Hx is formed at atmosphere of hydrogenation at a pressure of 0.1 MPa, leading to a bulge of crystal lattice and fracture along or through the grain; the alloy with higher W content absorps less hydrogen. The disproportionation begins when the temperature is above 600℃, and Sm2（Fe,W）17Hx alloy is decomposed into SmHx and α-Fe; at a temperature up to 700℃, the disproportionation degree is different for Sm2（Fe,W）17 with different W content, and more complete disproportionation occurs in the Sm2（Fe,W）17 alloy with less W element.
出处
《磁性材料及器件》
CAS
CSCD
北大核心
2009年第5期26-29,共4页
Journal of Magnetic Materials and Devices
关键词
Sm2(Fe
W)17合金
氢化
歧化
相组成
Sm2（Fe,W）17 alloys
hydrogenation
disproportionation
phase compositions
