Effects of AlN on the densification and mechanical properties of pressureless-sintered SiC ceramics

被引：0

作者：

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

Yujun Zhang ^{[1
,2
]}

Hongyu Gong ^{[1
,2
]}

Haibin Sun ^{[1
,2
]}

Yanxia Zhai ^{[4
]}

Weiya Zhu ^{[1
,2
]}

Jie Jing ^{[1
,2
]}

机构：

[1] Key Laboratory for Liquid–solid Structural Evolution & Processing of Materials of Ministry of Education, Shandong University

[2] Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University

[3] School of Materials and Chemical Engineering, Zhongyuan University of Technology

[4] Shandong Baona New Materials Co., Ltd.

来源：

ProgressinNaturalScience:MaterialsInternational | 2016年 / 26卷 / 01期

关键词：

SiC ceramics; AlN; Densification; Pressure-less sintering;

D O I：

暂无

中图分类号：

TQ174.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

In the present work, Si C ceramics was fabricated with Al N using B;C and C as sintering aids by a solid-state pressureless-sintered method. The effects of Al N contents on the densification, mechanical properties, phase compositions, and microstructure evolutions of as-obtained Si C ceramics were thoroughly investigated. Al N was found to promote further densification of the Si C ceramics due to its evaporation over 1800 °C,transportation, and solidification in the pores resulted from Si C grain coarsening. The highest relative density of 99.65% was achieved for Si C sample with 15.0 wt% Al N by the pressureless-sintered method at 2130 °C for 1 h in Ar atmosphere. Furthermore, the fracture mechanism for Si C ceramics containing Al N tended to transfer from single transgranular fracture mode to both transgranular fracture and intergranular fracture modes when the sample with 30.0 wt% Al N sintered at 1900 °C for 1 h in Ar. Also, Si C ceramics with 30.0 wt% Al N exhibited the highest fracture toughness of 5.23 MPa m;when sintered at 1900 °C.

引用

页码：90 / 96

页数：7

共 10 条

[1] Ceramics and ceramic matrix composites for heat exchangers in advanced thermal systems—A review[J] . A. Sommers,Q. Wang,X. Han,C. T’Joen,Y. Park,A. Jacobi. Applied Thermal Engineering . 2010 (11)
[2] Solid State Sintering of SiC-Ceramics[J] . Biswas Koushik. Materials Science Forum . 2009 (624)
[3] Thermal decomposition, densification and mechanical properties of AlN–SiC(–TiB 2 ) systems with and without B, B 4 C and C additives[J] . Sea-Hoon Lee,Shuqi Guo,Hidehiko Tanaka,Kenji Kurashima,Toshiyuki Nishimura,Yutaka Kagawa. Journal of the European Ceramic Society . 2008 (8)
[4] Dielectric and thermal properties of AlN ceramics[J] . Shoichi Kume,Masaki Yasuoka,Sang-Kee Lee,Akinori Kan,Hirotaka Ogawa,Koji Watari. Journal of the European Ceramic Society . 2006 (8)
[5] Superplastic behaviour of two extruded gamma TiAl(Mo,Si) materials[J] . José A. Jiménez,Oscar A. Ruano,Georg Frommeyer,Sven Knippscher. Intermetallics . 2005 (7)
[6] Thermal conductivity of silicon carbide densified with rare-earth oxide additives[J] . You Zhou,Kiyoshi Hirao,Koji Watari,Yukihiko Yamauchi,Shuzo Kanzaki. Journal of the European Ceramic Society . 2003 (2)
[7] Combustion synthesis of AlN–SiC solid solution particles[J] . Chen Kexin,Jin Haibo,Zhou Heping,José M.F. Ferreira. Journal of the European Ceramic Society . 2000 (14)
[8] Features of corrosion resistance of AlN–SiC ceramics in air up to 1600°C[J] . V.A Lavrenko,M Desmaison-Brut,A.D Panasyuk,J Desmaison. Journal of the European Ceramic Society . 1998 (16)
[9] Thermal conductivity in hot-pressed silicon carbide
Liu, DM
Lin, BW
[J]. CERAMICS INTERNATIONAL, 1996, 22 (05) : 407 - 414
[10] Fabrication and characterization of SiC-AIN alloys[J] . William Rafaniello,Kurn Cho,Anil V. Virkar. Journal of Materials Science . 1982 (12)

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