Preparation and mechanical properties of in situ TiCx-Ni (Si, Ti) alloy composites

被引：27
|
作者：
Wang, Wenjuan [1 ]
Zhai, Hongxiang [1 ]
Chen, Lin [1 ]
Huang, Zhenying [1 ]
Bei, Guoping [2 ]
Baumgaertner, Christoph [2 ]
Greil, Peter [2 ]
机构：
[1] Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Inst Mat Sci & Engn, Beijing 100044, Peoples R China
[2] Univ Erlangen Nurnberg, Dept Mat Sci Glass & Ceram, D-91058 Erlangen, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 616卷
基金：
中国国家自然科学基金;
关键词：
TiCx/Ni; (Si; Ti); composites; In situ; Hardness; Compressive behavior; METAL-MATRIX COMPOSITES; COMBUSTION SYNTHESIS; MICROSTRUCTURAL CHARACTERIZATION; TI3SIC2; DIFFUSION; STRENGTH; CARBIDE; CERMETS; PHASES; AL;
D O I：
10.1016/j.msea.2014.08.020
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Novel in situ TiCx reinforced Ni (Si, Ti) alloy composites with superior mechanical properties were prepared at 1250 C for 30 min by pressureless sintering Ti3SiC2 (10 and 20 vol%) and Ni as precursors. The Ti3SiC2 particles decomposed into substoichiometric Tic(x) phase, while the additional Si and partial Ti atoms derived from Ti3SiC2 diffused into Ni matrix to form Ni (Si, Ti) alloy. The in situ formed TiCx phases are mainly dispersed on the grain boundaries of the Ni (Si, Ti) alloying, forming a strong skeleton and refining the microstructures of the metal matrix. The hardness, the yield stress (sigma(0.2%) and ultimate compressive strength of 20.6 vol%TiCx-Ni(Si, Ti) composite can reach 2.15 +/- 0.04 GPa, 466.8 +/- 55.8 MPa and 7333 +/- 78.4 MPa, respectively. The enhanced mechanical properties of Tic(x)-Ni(Si, Ti) composites are due to the in situ formation of TiCx skeleton, the refined microstructures of Ni (Si, Ti) alloys and solid solution effects as well as good wettability between TiCx and Ni (Si, Ti) matrix. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：214 / 218
页数：5
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