In-situ synthesis of TiC/SiC/Ti3SiC2 composite coatings by spark plasma sintering

被引：32
|
作者：
Singh, Ashish [1 ]
Bakshi, Srinivasa R. [2 ,3 ]
Virzi, David A. [2 ]
Keshri, Anup K. [2 ]
Agarwal, Arvind [2 ]
Harimkar, Sandip P. [1 ]
机构：
[1] Oklahoma State Univ, Sch Mech & Aerosp Engn, Stillwater, OK 74078 USA
[2] Florida Int Univ, Dept Mech & Mat Engn, Miami, FL 33174 USA
[3] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
来源：
SURFACE & COATINGS TECHNOLOGY | 2011年 / 205卷 / 13-14期
关键词：
Ceramics; Coating materials; Sintering; Powder metallurgy; X-ray diffraction; MECHANICAL-PROPERTIES; TI3SIC2; MICROSTRUCTURE; PRESSURE;
D O I：
10.1016/j.surfcoat.2011.01.058
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Composite coatings consisting of TiC/SiC/Ti3SiC2 phases have been synthesized using spark plasma sintering (SPS) of Ti/SiC/C powder mixture on titanium substrate. The processing of composite coatings was achieved at 1300 degrees C and 1400 degrees C with a uniaxial pressure of 90 MPa and holding time of 8 min. Identification and quantification of the phases have been performed using x-ray diffraction (XRD). X-ray elemental maps obtained using EDS have been used to analyze the evolution of various phases and their distribution in the microstructure. A tentative mechanism for phase evolution based on exothermic reactions between various constituent powders has been proposed. Microhardness of the spark plasma sintered coatings was found to be similar to 3 times that of the Ti substrate resulting in similar to 100 times lower wear weight loss in ball-on-disc wear tests. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3840 / 3846
页数：7
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