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金属间化合物由于在高温下,硬度及强度高并抗氧化性、热稳定性优良,所以作为耐热结构用材料受到人们的关注。尤其Fe-Al系金属间化合物比其它金属间化合物价格低,密度低高温强度高,而且因氧化铝表面又具有优良的抗高温氧化性,因此其希望值更大。但是,该材料中夹杂物的晶界偏析和晶界结构会引起晶界脆性,所以韧性低是当前需要改进的当务之急大问题。对于该材料的研究几乎近来都以改善延性为目
Intermetallic compounds are attracting attention as materials for heat-resistant structures due to their high hardness and strength, high oxidation resistance and thermal stability at high temperatures. In particular, the Fe-Al-based intermetallic compounds are less expensive than other intermetallic compounds, have low density and high-temperature strength, and have a higher expected value because the alumina surface has excellent high-temperature oxidation resistance. However, grain boundary segregation and grain boundary structure of inclusions in the material can cause grain boundary brittleness, so the low toughness is a pressing issue that needs to be improved at present. Research on this material has been focused almost recently on improving ductility