Effect of Y<sub>2</sub>O<sub>3</sub> on Microstructure and Properties of cBN/SiAlON Composite-Reference-Cited by-同舟云学术

Effect of Y₂O₃ on Microstructure and Properties of cBN/SiAlON Composite

Published:2015-07 Issue: Volume:655 Page:22-26
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Shi Xiao Fei¹,Cai Zhi Xin¹,He Chao¹,Wang Jian Jun¹,Yue Xin Yan¹,Ru Hong Qiang¹

Affiliation:

1. Northeastern University

Abstract

cBN/SiAlON composites were prepared by spark plasma sintering (SPS) method using Si3N4, AlN, Al2O3,cBN and Y2O3 powders as raw materials. The sintering process is at the temperature of 1500°C holding for 5 min. Effect of the Y2O3 content on phase composition, microstructure, bulk density, hardness and fracture toughness of the cBN/SiAlON composite was investigated. The experimental results showed that when the Y2O3 content was 0.2 wt. % the bulk density and fracture toughness of the composite had the maximum values of 3.0 g/cm3 and KIC = 5.7 MPa∙m1/2, respectively. The cBN/SiAlON composite with 0.8 wt. % Y2O3 addition got the maximum hardness of 16.4 GPa.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.655.22.pdf

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