Synthesis, microstructure and mechanical properties of M2AlC-MC (M=Ti, Ta, Nb) composite

被引：0

作者：

Deng, Aoli ^{[1
,2
]}

Niu, Yuanbo ^{[1
]}

Zhang, Buhao ^{[3
]}

Lin, Nan ^{[1
]}

Ma, Chao ^{[1
]}

Huang, Zhengren ^{[2
]}

Yin, Jie ^{[2
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai, Peoples R China

[3] Univ Nottingham, Fac Engn, Nottingham NG7 2RD, England

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1014卷

基金：

中国国家自然科学基金;

关键词：

MAX phases; Mechanical properties; Reactive hot pressing; Solid solution strengthening; LATTICE THERMAL-CONDUCTIVITY; MAX-PHASE; HIGH-ENTROPY; M(N+1)AX(N) PHASES; TEMPERATURE; IRRADIATION; PROGRESS; AL;

D O I：

10.1016/j.jallcom.2025.178745

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：

M2AlC-MC (M=Ti, Ta, Nb) ceramic composite materials were fabricated via reactive hot pressing using metallic powders of Ti, Ta, Nb, Al, along with carbon black. The phase evolution during the sintering process was thoroughly investigated, confirming the formation of a solid solution with Ti, Nb, and Ta atoms occupying the Msite in the M2AlC structure. Advanced characterization techniques, including XRD, SEM, EDS, and STEM, revealed an equimolar distribution of these elements at the M-site. Compared to single-component M2AlC phases, the composites demonstrated a notable enhancement in Vickers hardness, with a measured value of 8.7 +/- 1.2 GPa at a sintering temperature of 1700 degrees C. However, this increase in hardness was accompanied by a reduction in fracture toughness, which reached 4.98 MPa & sdot;m1/2.

引用

页数：6

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