펄스전류 가열에 의한 나노구조의 (Ti,Mo)C 합성과 동시 급속소결 및 기계적 성질

조형곤; 권한중; 손인진; Hyoung-Gon Jo; Hanjung Kwon; In-Jin Shon

Korean Journal of Materials Research, Vol.23, No.11, 620-624, November, 2013

DOI10.3740/MRSK.2013.23.11.620 Export Citation

펄스전류 가열에 의한 나노구조의 (Ti,Mo)C 합성과 동시 급속소결 및 기계적 성질

Simultaneous Synthesis and Rapid Consolidation of Nanostructured (Ti,Mo)C and Its Mechanical Properties

조형곤, 권한중¹, 손인진^†

전북대학교 신소재공학부 차세대 바이오 이미징 연구센터
¹한국지질자원 연구원

Hyoung-Gon Jo, Hanjung Kwon¹, and In-Jin Shon^†

Division of Advanced Materials Engineering and Center for advanced bioimaging research, Engineering College, Chonbuk National University, 561-756, Korea
¹Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources, Daejeon, Korea

E-mail:

Nanocrystalline materials have recently received significant attention in the area of advanced materials engineering due to their improved physical and mechanical properties. A solid-solution nanocrystalline powder, (Ti,Mo)C, was prepared via high-energy milling of Ti-Mo alloys with graphite. Using XRD data, the synthesis process was investigated in terms of the phase evolution. Rapid sintering of nanostuctured (Ti,Mo)C hard materials was performed using a pulsed current activated sintering process (PCAS). This process allows quick densification to near theoretical density and inhibits grain growth. A dense, nanostructured (Ti,Mo)C hard material with a relative density of up to 96 % was produced by simultaneous application of 80 MPa and a pulsed current for 2 min. The average grain size of the (Ti,Mo)C was lower than 150 nm. The hardness and fracture toughness of the dense (Ti,Mo)C produced by PCAS were also evaluated. The fracture toughness of the (Ti,Mo)C was higher than that of TiC.

Keywords:nanomaterials;sintering;hardness;fracture toughness;hard materials

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[3] Karch J, Birringer R, Gleiter H, Nature, 330, 556 (1987)

[4] George AM, Iniguuze J, Bellaiche L, Nature, 413, 54 (2001)

[5] Hreniak D, Strek W, J. Alloys Compd., 341, 183 (2002)

[6] Kang HS, Ko IY, Yoon JK, Doh JM, Hong KT, Shon IJ, Met. Mater. Int., 17, 57 (2011)

[7] Fang Z, Eason JW, Int. J. Refrac. Met. H. Mater., 13, 297 (1995)

[8] Tok AIY, Luo IH, Boey FYC, J. Mater. Sci. Eng. A, 383, 229 (2004)

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[11] Shon IJ, Song HY, Cho SW, Kim W, Suh CY, Kor. J. Met. Mater., 50, 39 (2012)

[12] C. Suryanarayana, M. Grant Norton, X-ray Diffraction A Practical Approach, Plenum Press, New York. (1998)

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