Microstructural evolution in laser deposited nickel-titanium-carbon in situ metal matrix composites

被引：50

作者：

Gopagoni, S. ^{[1
,2
]}

Hwang, J. Y. ^{[1
,2
]}

Singh, A. R. P. ^{[1
,2
]}

Mensah, B. A. ^{[1
,2
]}

Bunce, N. ^{[1
,2
]}

Tiley, J. ^{[3
]}

Scharf, T. W. ^{[1
,2
]}

Banerjee, R. ^{[1
,2
]}

机构：

[1] Univ N Texas, Ctr Adv Res & Technol, Denton, TX 76203 USA

[2] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA

[3] USAF, Mat & Mfg Directorate, Res Lab, Dayton, OH 45433 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 04期

基金：

美国国家科学基金会;

关键词：

Metal matrix composite; Laser deposition; Ni-Ti-C; Microstructural evolution; Mechanical properties; FABRICATION; TI; NI;

D O I：

10.1016/j.jallcom.2010.09.208

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Laser deposition of a mixture of elemental nickel titanium and carbon (graphite) powders via the laser engineered net shaping (LENS) process results in an in situ titanium carbide reinforced nickel metal matrix composites The composites have been characterized in detail using X-ray diffraction scanning electron microscopy (including energy dispersive spectroscopy mapping) Auger electron spectroscopy and transmission (including high resolution) electron microscopy Both primary and eutectic titanium carbides observed in this composite exhibited the FCC-TiC structure (NaCl-type) Detailed characterization of the nickel/titanium carbide interface w is carried out using high resolution TEM with the orientation relationship between the phases being < 1 0 0 > TiC//< 1 1 0 > Ni and (0 0 2) TiC//((1) over bar 1 1) Ni Mechanical and tribological testing determined that the composites exhibited a relatively high hardness of 370 VHN and a steady-state friction coefficient of similar to 0 5 both improvements in comparison to LENS deposited pure Ni (C) 2010 Elsevier B V All rights reserved

引用

页码：1255 / 1260

页数：6

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