Interface characteristics in ZrB2-based ceramics containing SiC and/or ZrC particles via hot-pressing sintering

被引：13

作者：

Liu, Hu-Lin ^{[1
]}

Liu, Ji-Xuan ^{[2
]}

Bao, Wei-Chao ^{[3
]}

Xu, Fang-Fang ^{[3
]}

Zhang, Guo-Jun ^{[2
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Shaanxi Key Lab Green Preparat & Functionalizat I, Xian 710021, Peoples R China

[2] Donghua Univ, Res Inst Funct Mat, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[3] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2021年 / 176卷 / 176期

基金：

中国国家自然科学基金;

关键词：

Zirconium diboride (ZrB2); Zirconium carbide (ZrC); Microstructures; Grain boundaries; Interfaces; HIGH-TEMPERATURE CERAMICS; GRAIN-BOUNDARY ENERGY; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; THERMAL-PROPERTIES; ZRB2; ZRB2-SIC-ZRC; GROWTH; COMPOSITES; CARBIDE;

D O I：

10.1016/j.matchar.2021.111144

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZrB2-based ceramics containing SiC and/or ZrC were prepared by hot-pressing sintering. The characteristics of different interfaces in the sintered ceramics and their relationships with chemical compositions were investigated via SEM, HRTEM, EBSD and dihedral angle analysis. Atoms at ZrB2-ZrB2 grain boundaries (GBs) preferentially arrange orderly when ZrC is introduced into ZrB2 matrix. The percentages of rounded ZrB2-ZrB2 GBs at microscale decrease from 68.8% in ZrB2-20SiC (number in vol%) to 31.1% in ZrB2-20ZrC. Atomic arrangement at ZrB2-ZrC interfaces satisfies unique orientation relationship that (101)(ZrB2) is parallel to (110)(ZrC) and [010](ZrB2) is parallel to [1 (1) over bar0](ZrC) simultaneously. Interfacial energies of different interfaces were studied by dihedral angle analysis, which indicates that ZrB2-ZrC interfaces have lower interfacial energies and ZrB2-ZrB2 GBs exhibit anisotropic interfacial energies in the ceramics containing ZrC.

引用

页数：10

共 56 条

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