Preparation and mechanical properties of TiCx-Ni3(Al,Ti)/Ni composites synthesized from Ni alloy and Ti3AlC2 powders

被引：49

作者：

Hu, Wenqiang ^{[1
]}

Huang, Zhenying ^{[1
,2
]}

Cai, Leping ^{[1
]}

Lei, Cong ^{[1
]}

Zhai, Hongxiang ^{[1
]}

Hao, Suming ^{[1
]}

Yu, Wenbo ^{[1
]}

Zhou, Yang ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Mech & Elect Control Engn, Inst Mat Sci & Engn, Beijing 100044, Peoples R China

[2] Beijing Jiaotong Univ, Minist Educ, Key Lab Vehicle Adv Mfg Measuring & Control Techn, Beijing, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 697卷

基金：

美国国家科学基金会;

关键词：

Ni-based composites; Ti3AlC2; TiCx; Ni-3(Al Ti); Hot-press sintering; Mechanical properties; MICROSTRUCTURE EVOLUTION; MAX PHASES; BEHAVIOR; CU; FABRICATION; COATINGS; AL; RESISTANCE; STABILITY; STRENGTH;

D O I：

10.1016/j.msea.2017.04.113

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, a novel TiCx-Ni-3(Al,Ti)/Ni alloy composite was successfully synthesized from Ti3AlC2 (20 vol% and 40 vol%) and Ni starting powders via in-situ hot-pressing route at 1200 degrees C under 30 MPa. As the interleaved Al atoms diffused out from Ti3AlC2 nanolayers, Ti3AlC2 decomposed into nonstoichiometric nano-TiCx particles while the additional Al and fractional Ti atoms reacted with Ni matrix to form Ni-3(Al,Ti). Due to the homogeneous distribution of ultrafine TiCx and Ni-3(Al,Ti) particles in Ni matrix, Hardness, flexural strength and fracture toughness of the composite reinforced with 20 vol% of Ti3AlC2 increased 50%, 50% and 70%, in comparison with the pure Ni alloy prepared under the same condition. In addition, the positive temperature dependence of flexural strength was detected in 40vol%Ti3AlC2-Ni alloy sample in the temperature range of 20 degrees C and 700 degrees C, and the maximum of flexural strength could reach 989 +/- 28 MPa at 700 degrees C.

引用

页码：48 / 54

页数：7

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