The coalloying with high contents of chromium(Cr),boron(B)and yttrium(Y)for porous B2-structured FeAl intermetallics fabricated through reactive synthesis was conducted.The oxidation behaviors of porous FeAl-based mat...The coalloying with high contents of chromium(Cr),boron(B)and yttrium(Y)for porous B2-structured FeAl intermetallics fabricated through reactive synthesis was conducted.The oxidation behaviors of porous FeAl-based materials were investigated by evaluating the pore-structure evolution,oxidation kinetics and oxide-scale configuration.The results show that with the coalloying of high contents of Cr,B and Y,the oxidation mass gains of porous FeAl materials at 600−800℃ are significantly reduced.The combination of B enriched on the surface of oxide scales and Y located at the scale−metal interface promotes the formation of thin protective nodularα-Al_(2)O_(3) oxide scales.It is indicated that introducing relatively high contents of reactive elements such as B and Y can benefit the selective growth ofα-Al_(2)O_(3) scales at relatively low temperatures without pre-treatment.展开更多
基金financial supports from the National Natural Science Foundation of China (No.51801183)the Natural Science Foundation of Zhejiang Province,China (No.GG21E010011)。
文摘The coalloying with high contents of chromium(Cr),boron(B)and yttrium(Y)for porous B2-structured FeAl intermetallics fabricated through reactive synthesis was conducted.The oxidation behaviors of porous FeAl-based materials were investigated by evaluating the pore-structure evolution,oxidation kinetics and oxide-scale configuration.The results show that with the coalloying of high contents of Cr,B and Y,the oxidation mass gains of porous FeAl materials at 600−800℃ are significantly reduced.The combination of B enriched on the surface of oxide scales and Y located at the scale−metal interface promotes the formation of thin protective nodularα-Al_(2)O_(3) oxide scales.It is indicated that introducing relatively high contents of reactive elements such as B and Y can benefit the selective growth ofα-Al_(2)O_(3) scales at relatively low temperatures without pre-treatment.
