TY - JOUR
T1 - Directionally solidified microstructure of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy
AU - Guan, P.
AU - Guo, X. P.
AU - Ding, X.
AU - Zhang, J.
AU - Gao, L. M.
AU - Kusabiraki, K.
PY - 2004/8
Y1 - 2004/8
N2 - The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nbss), eutectic colonies of Nbss plus (Nb, Ti)3Si/(Nb, Ti)5Si3 and chains of (Nb, Ti)3Si/(Nb, Ti)5Si3 plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nbss+(Nb, Ti)3Si/(Nb, Ti)5Si3 eutectic colonies and (Nb, Ti)3Si/(Nb, Ti)5Si3 plates increase. There appear nodes in the (Nb, Ti)3Si/(Nb, Ti)5Si3 plates.
AB - The directionally solidified samples of an ultra-high temperature Nb-Si-Ti-Hf-Cr-Al alloy have been prepared with the use of an electron beam floating zone melting (EBFZM) furnace, and their microstructural characteristics have been analyzed. All the primary dendrites of Nb solid solution (Nbss), eutectic colonies of Nbss plus (Nb, Ti)3Si/(Nb, Ti)5Si3 and chains of (Nb, Ti)3Si/(Nb, Ti)5Si3 plates align along the growth direction of the samples. With increasing of the withdrawing rate, the microstructure is refined, and the amounts of Nbss+(Nb, Ti)3Si/(Nb, Ti)5Si3 eutectic colonies and (Nb, Ti)3Si/(Nb, Ti)5Si3 plates increase. There appear nodes in the (Nb, Ti)3Si/(Nb, Ti)5Si3 plates.
KW - In situ composite
KW - Microstructural evolution
KW - Nb-Si based alloy
KW - Ultra-high temperature alloy
KW - Unidirectional solidification
UR - http://www.scopus.com/inward/record.url?scp=7944236982&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:7944236982
SN - 1006-7191
VL - 17
SP - 450
EP - 454
JO - Acta Metallurgica Sinica (English Letters)
JF - Acta Metallurgica Sinica (English Letters)
IS - 4
ER -