Effect of Sintering Temperature on Microstructure and Mechanical Properties for the Spark Plasma Sintered Titanium from CP-Ti Powders

Kyeong-Sik Cho; In-Beom Song; Min-Hyeok Jang; Ji-Hye Yoon; Myung-Hoon Oh; Jae-Keun Hong; Nho-Kwang Park

doi:10.4150/KPMI.2010.17.5.365

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CP-Ti 분말로부터 스파크 플라즈마 소결한 타이타늄의 미세구조와 기계적 성질에 미치는 소결 온도의 영향: 조경식, 송인범, 장민혁, 윤지혜, 오명훈, 홍재근, 박노광
Effect of Sintering Temperature on Microstructure and Mechanical Properties for the Spark Plasma Sintered Titanium from CP-Ti Powders: Kyeong-Sik Cho, In-Beom Song, Min-Hyeok Jang, Ji-Hye Yoon, Myung-Hoon Oh, Jae-Keun Hong, Nho-Kwang Park; Journal of Korean Powder Metallurgy Institute 2010;17(5):365-372
DOI: https://doi.org/10.4150/KPMI.2010.17.5.365

¹금오공과대학교 신소재시스템공학부
²금오공과대학교 신소재시스템공학부
³금오공과대학교 신소재시스템공학부
⁴금오공과대학교 신소재시스템공학부
⁵금오공과대학교 신소재시스템공학부
⁶한국기계연구원 재료연구소 특수합금연구그룹
⁷한국기계연구원 재료연구소 특수합금연구그룹
¹School of Advanced Materials & System Engineering, Kumoh National Institute of Technology
²School of Advanced Materials & System Engineering, Kumoh National Institute of Technology
³School of Advanced Materials & System Engineering, Kumoh National Institute of Technology
⁴School of Advanced Materials & System Engineering, Kumoh National Institute of Technology
⁵School of Advanced Materials & System Engineering, Kumoh National Institute of Technology
⁶Special Alloys Research Group, Korea Institute of Materials Science (KIMS)
⁷Special Alloys Research Group,

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Abstract

The evolution of sinterability, microstructure and mechanical properties for the spark plasma sintered(SPS) Ti from commercial pure titanium(CP-Ti) was studied. The densification of titanium with 200 mesh and 400 mesh pass powder was achieved by SPS at 750sim1100°C under 10 MPa pressure and the flowing H_2+Ar mixed gas atmosphere. The microstructure of Ti sintered up to 800°C consisted of equiaxed grains. In contrast, the growth of large elongated grains was shown in sintered bodies at 900°C with the 400 mesh pass powder and the lamella grains microstructure had been developed by increasing sintering temperature. The Vickers hardness of 240~270 HV and biaxial strength of 320~340 MPa were found for the specimen prepared at 950°C.

Keywords: Commercial pure titanium;Spark plasma sintering;Densification;Microstructure;

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