Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing

被引：18

作者：

Li, Shufen ^{[1
,2
,3
]}

Zhu, Yabin ^{[1
,2
]}

Chai, Jianlong ^{[1
,2
]}

Liu, Yiwen ^{[1
]}

Niu, Lijuan ^{[1
,2
,3
]}

Gao, Xing ^{[1
]}

Jin, Peng ^{[1
,2
]}

Shen, Tielong ^{[1
,2
]}

Cui, Minghuan ^{[1
,2
]}

Wang, Zhiguang ^{[1
,2
]}

Xie, Erqing ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China

[3] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 860卷 / 860期

基金：

中国国家自然科学基金;

关键词：

Zirconium carbide; Zirconia toughened alumina; Microstructure; Mechanical properties; Hot pressing;

D O I：

10.1016/j.jallcom.2020.158402

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：

In the present work, effects of ZrC addition (10, 15, 20, 25 vol%) on microstructure and mechanical properties of ZTA 20 mol% (Zirconia-20 mol% Toughened Alumina) ceramic composites were investigated. Samples were prepared by Hot Pressing Sintering (HP) at 1600 degrees C and 30 MPa for a soaking time of 2 h. Microstructures were characterized by XRD, Raman, SEM and TEM. XRD and Raman spectra results revealed that only ZrC, alpha-Al2O3 and ZrO2 were detected for all composites, indicating that these ceramic composites had excellent chemical compatibilities. SEM images showed refined microstructure was obtained, and the fracture surfaces exhibited a mixed process of transgranular and intergranular fracture. According to the TEM observations, some nano-sized ZrC particles dispersed inside Al2O3 grains and formed an intra/inter-type nanostructure. The relative densities and Vickers hardness were inversely proportional to ZrC content, which gradually decreased from 98.24% to 94.89%, from 1 847-1691 HV1, respectively. Flexural strength and fracture toughness were tested by three-point bending method and single-edge notched beam method, respectively. The fracture toughness increased at first and then decreased with ZrC content increased from 0 to 25 vol%. The maximum value was 11.23 MPa m(1/2) with 20 vol% ZrC addition, with an enhancement of 51% compared to the undoped ZTA mixture. The flexural strength, with a maximum of 1121 MPa without ZrC addition and decreased to 645 MPa with ZrC-10(vol%) addition, then increased monotonously to 1084 MPa as the ZrC content increased from 10 to 25 vol%. (C) 2020 The Author(s). Published by Elsevier B.V. CC_BY_NC_ND_4.

引用

页数：8

共 39 条

[1]

Abden M.J., 2014, International Journal of Materials Engineering, V4, P129, DOI DOI 10.5923/J.IJME.20140404.02

[2]

[Anonymous], 2020, E399 ASTM

[3]

[Anonymous], 2016, ISO 14704

[4]

Awaji H., 2004, J CERAM SOC JPN, V112, P912

[5] Effect of Al2O3/YSZ microstructures on wear and mechanical properties of cutting inserts [J].

Azhar, Ahmad Zahirani Ahmad ;

Ratnam, M. M. ;

Ahmad, Zainal Arifin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 478 (1-2) :608-614

[6] New ZrO2/Al2O3 Nanocomposite Fabricated from Hybrid Nanoparticles Prepared by CO2 Laser Co-Vaporization [J].

Bartolome, Jose F. ;

Smirnov, Anton ;

Kurland, Heinz-Dieter ;

Grabow, Janet ;

Mueller, Frank A. .

SCIENTIFIC REPORTS, 2016, 6

[7]

Bengisu M, 2001, ENG MATER, P407, DOI DOI 10.1007/978-3-662-04350-9_6

[8]

Bengisu M., 2001, Engineering Ceramics, DOI DOI 10.1007/978-3-662-04350-9_4

[9] Fracture toughness of alumina and ZTA ceramics: microstructural coarsening effects [J].

Casellas, D ;

Nagl, MM ;

Llanes, L ;

Anglada, A .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2003, 143 :148-152

[10] Microstructure and mechanical properties of SPS sintered Al2O3-ZrO2 (3Y)-SiC ceramic composites [J].

Chai, Jianlong ;

Zhu, Yabin ;

Wang, Zhiguang ;

Shen, Tielong ;

Liu, Yiwen ;

Niu, Lijuan ;

Li, Shufen ;

Yao, Cunfeng ;

Cui, Minghuan ;

Liu, Chao .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2020, 781

← 1 2 3 4 →