TY - JOUR
T1 - Sc 添加 Ti-Zr 系焼結合金の強化機構
AU - Kariya, Shota
AU - Nagata, Kouki
AU - Umeda, Junko
AU - Chen, Biao
AU - Shen, Jianghua
AU - Li, Shufeng
AU - Kondoh, Katsuyoshi
N1 - Publisher Copyright:
© 2024 Journal of the Japan Society of Powder and Powder Metallurgy. All rights reserved.
PY - 2024/10
Y1 - 2024/10
N2 - In this study, Ti-Zr-Sc sintered alloys with excellent biocompatibility were fabricated from the elemental mixture of pure Ti, ZrH2 and ScH2 powders, and their microstructures and mechanical properties were investigated to clarify the strengthening mechanism. In particular, the effect of scandium (Sc) used as the third alloying element on the strengthening behavior by grain refinement, oxygen (O) and Sc solid solution, and Sc2O3 particle dispersion was quantitatively evaluated by using the theoretical strengthening models. 0.2% YS of Ti-Zr-Sc alloys decreased with Sc content in the range of 0~1.0 at.% Sc, and increased in the range of 1.0~2.5 at.% Sc. In the former, the added Sc elements reacted with O solutes to form Sc2O3 particles and resulted in a significant decrease of O solid solution strengthening effect. On the other hand, when Sc content was over 1.0 at.%, the strengthening effects by both Sc solid solution and Sc2O3 dispersion were effective, and cause a remarkable increment of 0.2% YS of Ti-Zr-Sc sintered alloys.
AB - In this study, Ti-Zr-Sc sintered alloys with excellent biocompatibility were fabricated from the elemental mixture of pure Ti, ZrH2 and ScH2 powders, and their microstructures and mechanical properties were investigated to clarify the strengthening mechanism. In particular, the effect of scandium (Sc) used as the third alloying element on the strengthening behavior by grain refinement, oxygen (O) and Sc solid solution, and Sc2O3 particle dispersion was quantitatively evaluated by using the theoretical strengthening models. 0.2% YS of Ti-Zr-Sc alloys decreased with Sc content in the range of 0~1.0 at.% Sc, and increased in the range of 1.0~2.5 at.% Sc. In the former, the added Sc elements reacted with O solutes to form Sc2O3 particles and resulted in a significant decrease of O solid solution strengthening effect. On the other hand, when Sc content was over 1.0 at.%, the strengthening effects by both Sc solid solution and Sc2O3 dispersion were effective, and cause a remarkable increment of 0.2% YS of Ti-Zr-Sc sintered alloys.
KW - grain refinement
KW - hydride powder
KW - oxide dispersion
KW - sintering strengthening mechanism
KW - solid solution
KW - Ti-Zr-Sc alloy
UR - http://www.scopus.com/inward/record.url?scp=85206972716&partnerID=8YFLogxK
U2 - 10.2497/jjspm.23-00067
DO - 10.2497/jjspm.23-00067
M3 - 文章
AN - SCOPUS:85206972716
SN - 0532-8799
VL - 71
SP - 482
EP - 491
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
IS - 10
ER -