The preparation, microstructure and mechanical properties of a dense MgO-Al2O3-SiO2 based glass-ceramic coating on porous BN/Si2N2O ceramics

被引：6

作者：

Sun, Yangshan ^{[1
,2
]}

Cai, Delong ^{[1
,2
]}

Yang, Zhihua ^{[1
,2
,3
]}

Li, Hailiang ^{[1
,2
]}

Li, Quan ^{[1
,2
]}

Jia, Dechang ^{[1
,2
,3
]}

Zhou, Yu ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Inst Adv Ceram, Bldg C3,2 Yikuang St, Harbin 150080, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Key Lab Adv Struct Funct Integrat Mat & Green Mfg, Harbin 150001, Heilongjiang, Peoples R China

[3] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China

来源：

RSC ADVANCES | 2018年 / 8卷 / 31期

基金：

中国国家自然科学基金;

关键词：

MULTILAYER CHIP INDUCTORS; CRYSTAL-STRUCTURE; SILICON-CARBIDE; COMPOSITES; CRYSTALLIZATION; TEMPERATURE; NITRIDE; PHASE; FABRICATION; PRECURSOR;

D O I：

10.1039/c8ra00571k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A dense MgO-Al2O3-SiO2 based glass-ceramic coating was prepared by a doctor blade process on a porous BN/Si2N2O ceramic surface followed by heat treatment at 1050 degrees C under nitrogen flow. The phase composition, microstructure, mechanical properties and water absorption of the coating were studied. The coating consisted of alpha-cordierite phase with a small amount of glass phase. The dense coating without pores and cracks was favorable to seal and densify the porous ceramic surface due to part of the molten glass infiltrating the surface pores. The coating was defect-free and tightly bonded to the substrate because of a larger bonding area between the coating and the substrate. The elastic modulus and bending strength of the glass-ceramic coating were 37.9 GPa and 67.1 MPa, respectively. Moreover, the coated samples had a high Vickers hardness and low water absorption.

引用

页码：17569 / 17574

页数：6

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