摘要
采用电子探针、二次离子质谱、无汞真空套管测氢仪等检测手段,并配合金相分析及试样孔隙度的测定,鉴定出含稀土的Al-Si合金中有稀土氢化物的存在,确认在多元稀土金属间化合物中氢的富集,提出稀土具有较强固氢作用的观点。对加稀土前后Al-Si合金中各形态氢的相对含量变化作了定性分析,对稀土净化Al合金的原因进行了探讨,指出固氢是降低游离氢含量、减少氢致缺陷的重要原因。
Occurrence of RE hydride was identified in the Al-Si alloy containing RE and
enrichment of hydrogen in polynary RE intermetallic compound was determined by means of
EPMA, secondary ion mass spectrography, Hg-free vacuum drivepipe hydrogen-meter to-
gether with metallography and porosity measurement. The relative contents of various forms
of hydrogen before and after RE added in Al-Si alloy have been qualitatively analysed. A
concept about firm fixation of hydrogen by RE was suggested. It is believed that the hydrogen
fixation is the major cause of reducing free hydrogen content and decreasing hydrogen-in-
duced defects.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第1期A016-A020,共5页
Acta Metallurgica Sinica
关键词
稀土
氢
铝硅合金
Al-Si alloy
rare earth
hydrogen
