Preparation of SiAlON-cBN composites using Ni nanoparticle precipitated cBN powders

Jianfeng Zhang, Rong Tu, Takashi Goto

研究成果: Conference contribution

抄録

SiAlON was mixed with Ni nanoparticle precipitated cBN (SiAlON-cBN/Ni) and sintered by spark plasma sintering at 1923 K for a holding time (tH) of 0 to 1.8 ks. The effect of Ni nanoparticle and holding time on the phase transformation of cBN to hexagonal (hBN), densification, microstructure and hardness of the SiAlON-cBN composites was studied. At tH =1.8 ks, the relative density of the SiAlON-20 vol% cBN/Ni was 99%, 7% higher than that of SiAlON-20 vol% cBN, indicating that Ni nanoparticle on cBN promoted the densification of SiAlON-cBN composites. The BN grains in SiAlON-20 vol% cBN showed a round morphology, whereas the BN grains in SiAlON-20 vol% cBN/Ni composite showed a flake morphology characteristic of hBN. The phase transformation of cBN was accelerated by Ni. The maximum hardness of SiAlON-20 vol% cBN/Ni was 16.3 GPa obtained at tH = 0 ks.

本文言語English
ホスト出版物のタイトルMaterials Integration
出版社Trans Tech Publications Ltd
ページ17-20
ページ数4
ISBN(印刷版)9783037853764
DOI
出版ステータスPublished - 2012
イベントInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
継続期間: 2011 12月 12011 12月 2

出版物シリーズ

名前Key Engineering Materials
508
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
国/地域Japan
CitySendai
Period11/12/111/12/2

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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