TY - JOUR
T1 - Quantitative evaluation of microstructure in Mo-Si-B-TiC alloy produced by melting and tilt casting method
AU - Uemura, Sojiro
AU - Yamamuro, Takateru
AU - Kim, Joung Wook
AU - Morizono, Yasuhiro
AU - Tsurekawa, Sadahiro
AU - Yoshimi, Kyosuke
N1 - Publisher Copyright:
© 2016 The Japan Institute of Metals and Materials.
PY - 2016
Y1 - 2016
N2 - Mo-Si-B-TiC alloys have been produced as candidates for a ultrahigh-temperature materials to replace Ni-base superalloys. We have quantitatively investigated the microstructure of a Mo-Si-B-TiC alloy composition. Mo-5Si-10B-10TiC (65Mo alloy) (at%) produced via arc-melting and tilt casting techniques. The starting material was composed of four constituent phases: Mo solid solution (Moss), Mo5SiB2, (Ti, Mo)Cx, (Mo, Ti)2C, and their eutectic (or peritecteutectic) phases. The compositions of these constituent phases were determined by EPMA. SEM-EBSD measurements revealed that T2 and (Ti, Mo)Cx phases have orientation relationships with Mo phase: {11-0}Mo//(001)T2, 〈111〉Mo//〈100〉T2 and {11-0}Mo//{11-1}(Ti, Mo)Cx, 〈111〉Mo//〈110〉 (Ti, Mo)Cx. Furthermore, 3-dimensional SEM examination combined with the FIB serial sectioning technique demonstrated that the T2 phase had a thin plate shape of orientation (001) for the plate surfaces and {100} for side ones.
AB - Mo-Si-B-TiC alloys have been produced as candidates for a ultrahigh-temperature materials to replace Ni-base superalloys. We have quantitatively investigated the microstructure of a Mo-Si-B-TiC alloy composition. Mo-5Si-10B-10TiC (65Mo alloy) (at%) produced via arc-melting and tilt casting techniques. The starting material was composed of four constituent phases: Mo solid solution (Moss), Mo5SiB2, (Ti, Mo)Cx, (Mo, Ti)2C, and their eutectic (or peritecteutectic) phases. The compositions of these constituent phases were determined by EPMA. SEM-EBSD measurements revealed that T2 and (Ti, Mo)Cx phases have orientation relationships with Mo phase: {11-0}Mo//(001)T2, 〈111〉Mo//〈100〉T2 and {11-0}Mo//{11-1}(Ti, Mo)Cx, 〈111〉Mo//〈110〉 (Ti, Mo)Cx. Furthermore, 3-dimensional SEM examination combined with the FIB serial sectioning technique demonstrated that the T2 phase had a thin plate shape of orientation (001) for the plate surfaces and {100} for side ones.
KW - Microstructure
KW - Molybdenum
KW - Molybdenum-silicon-boron alloys
KW - Three-dimensional analysis
KW - Titanium carbide
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U2 - 10.2320/jinstmet.J2016010
DO - 10.2320/jinstmet.J2016010
M3 - Article
AN - SCOPUS:84979895353
VL - 80
SP - 529
EP - 538
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 8
ER -