Textured SiAlON Ceramic with Centripetal Grain Alignment

被引：0

作者：

Xiao S. ^{[1
]}

Tan D. ^{[1
,2
]}

Li W. ^{[1
]}

Guo W. ^{[2
]}

Lin H. ^{[2
]}

机构：

[1] School of Electromechanical Engineering, Lingnan Normal University, Zhanjiang

[2] School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 12期

关键词：

anisotropy; centripetal alignment; SiAlON; texture;

D O I：

10.14062/j.issn.0454-5648.20230406

中图分类号：

学科分类号：

摘要：

A textured SiAlON ceramic with a centripetal grain alignment was obtained via sinter-forging through outer diameter strain ring compression using spark plasma heating. The microstructure, texturing degree and anisotropy of mechanical properties of the ceramic were investigated. The results show that the c-axis (i.e., long axis) of the rod-like SiAlON grains is parallel to the radial direction of the cylindrical sample, forming a centripetal grain alignment. The average included angle between the c-axis and radial direction is 19.2° and 9.9° on the plane perpendicular to pressing direction and parallel to radial direction, respectively. The degree of centripetal texture is 0.79. The hardness on the plane perpendicular to pressing direction is 12% greater than that on the plane perpendicular to radial section, reaching 17.85 GPa. The flexural strength with fracture plane perpendicular to radial section is 57% greater than that with fracture direction parallel to radial direction, which is 1 341 MPa. The fracture toughness with crack propagation perpendicular to radial section is 75% higher than that with crack direction parallel to radial direction, which is 6.27 MPa·m1/2 © 2023 Chinese Ceramic Society. All rights reserved.

引用

页码：3144 / 3151

页数：7

共 28 条

[1]

EKSTROM T, NYGREN M., SiAION ceramics[J], J Am Ceram Soc, 75, 2, pp. 259-276, (1992)

[2]

SUN Shilei, ZHAO Jie, Tool Eng (in Chinese), 49, 8, pp. 11-14, (2015)

[3]

ZHANG Zhan, Research on preparation and performance of α-sialon-based ceramic tool material, (2021)

[4]

KANZAKI S, BRITO M E, VALECILLOS M C, Et al., Microstructure designing of silicon nitride[J], J Eur Ceram Soc, 17, 15–16, pp. 1841-1847, (1997)

[5]

MILLER P D, BOWMAN K J., Hertzian fracture of textured Si<sub>3</sub>N<sub>4</sub>, Acta Mater, 44, 8, pp. 3025-3034, (1996)

[6]

ZHU X W, SAKKA Y., Textured silicon nitride: Processing and anisotropic properties, Sci Technol Adv Mater, 9, 3, (2008)

[7]

JIANG Q G, LIU J, GUO W M, Et al., A novel hot pressing flowing sintering for preparation of texturing ceramics[J], J Am Ceram Soc, 98, 9, pp. 2696-2699, (2015)

[8]

ZHU X W, SUZUKI T S, UCHIKOSHI T, Et al., Highly texturing β-sialon via strong magnetic field alignment[J], J Am Ceram Soc, 91, 2, pp. 620-623, (2008)

[9]

KUSHAN S R, TAMSU N, ACIKBAS N C, Et al., Textured α-SiAlON ceramics via templated grain growth[J], Mater Sci Forum, 554, pp. 79-84, (2007)

[10]

ZHU X W, SAKKA Y, ZHOU Y, Et al., A strategy for fabricating textured silicon nitride with enhanced thermal conductivity[J], J Eur Ceram Soc, 34, 10, pp. 2585-2589, (2014)

← 1 2 3 →