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Invited Seminar] Prof. RAJARSHI BANERJEE(University of North Texas)


: 2011. 9. 15 11:00

: KI빌딩(E4) 4F Lecture Room

of Materials Sci. and Engg. University of North

: 신소재공학과 전석우 교수(T.3342), KINC 사무실( T.7271)

Laser Deposited TiC/ Ni Composites for
Surface Engineering Applications

□ Abstract

TiC/Ni metal matrix composites have been processed using
the laser engineered net shaping (LENS) process. As nickel does not form an
equilibrium carbide phase, addition of a strong carbide former in the form of
titanium reinforces the nickel matrix resulting in a promising hybrid material
for both hard-facing as well as high temperature structural applications.
Changing the relative amounts of titanium and carbon in the nickel matrix,
relatively low volume fraction of refined homogeneously distributed carbide
precipitates, formation of in-situ carbide precipitates and the microstructural
changes are investigated. The results proved that lower C/Ti ratio consisted of
primary faceted TiC precipitates distributed in eutectic Ni+ TiC matrix leads
to hard composite. In contrast, a higher C/Ti ratio with large volume fraction
of graphite bundles distributed in the eutectic Ni+ TiC leads to softer
composite without volume fraction change in eutectic TiC. These composites are
characterized using Scanning electron Microscope (SEM), X- Ray Diffraction
(XRD), Auger Electron Spectroscopy (AES) and Transmission Electron Microscope
(TEM). Site-specific laser-pulsed atom probe tomography tomography (APT)
studies have been performed on the carbide in the Ni matrix. The experimentally
measured carbon concentration within the primary TiC appears to be changing
from the carbide/nickel interface towards the core of the carbide while the
eutectic TiC precipitates appear to exhibit a more uniform carbon
concentration. Additionally, the structure of the TiC/Ni interface and the
orientation relationship between carbides and matrix will also be discussed in
this study.

List of Articles
번호 제목 날짜
81 [KINC Invited Seminar] Shu Yang (Dept. of MSE, Univ. of Pennsylvania) file 2011.05.30
80 [KINC Invited Seminar] Prof. Yongfang Li(Institute of Chemistry) file 2012.05.17
79 [KINC Invited Seminar] Prof. Suck Won Hong (Pusan National Univ.) file 2011.03.21
78 [KINC Invited Seminar] Prof. Rodney S. Ruoff(Director, Center for Multidimensional Carbon Materials (CMCM)) file 2014.02.07
» [KINC Invited Seminar] Prof. RAJARSHI BANERJEE(University of North Texas) 2011.09.05
76 [KINC Invited Seminar] Prof. MinJun Kim, Drexel University file 2014.06.23
75 [KINC Invited Seminar] Prof. Coskun Kocabas (Bilkent Univ.) file 2013.08.06
74 [KINC Invited Seminar] Prof. Byounghak Lee(Dept. of Physics, Texas State University) file 2013.06.14
73 [KINC Invited Seminar] Prof. Ali Shakouri(Purdue University, Director of the Birck Nanotechnology Center) 2014.02.07
72 [KINC Invited Seminar] Patrick Stayton & Allan S. Hoffman(Univ. of Washington) file 2011.01.14
71 [KINC Invited Seminar] Dr. Enrico Benassi(Nanoscience Institute S3 / Physics Dep.) file 2012.06.14
70 [KINC Invite Seminar] Prof. Young-Jun Yu (Dept. of Physics, Columbia Univ.) 2011.09.23
69 [Invited Seminar] Prof. Nicholas A. Kotov (University of Michigan) file 2011.08.16
68 [EEWS-KINC Special Seminar] Prof. Singho JIN (Materials Program, UCSD) file 2013.07.09
67 Won Jun Jo (Massachusetts Institute of Technology) file 2016.11.07
66 Seminar안내-진병두박사(KIST), 08.4.7 2008.11.07
65 Seminar안내-이호성박사(KOSEF), 08.6.26 2008.11.07
64 Seminar안내-박지용 박사 (아주대), 09.04.2 2009.03.23
63 Seminar안내-김필립박사(Columbia Univ.), 08.12.10(수) 15시 2008.11.26
62 Seminar안내-Prof. Yoshio Bando(NIMS), 08.8.26 2008.11.07
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