TY - GEN
T1 - Preparation of SiAlON-cBN composites using Ni nanoparticle precipitated cBN powders
AU - Zhang, Jianfeng
AU - Tu, Rong
AU - Goto, Takashi
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - CBN
KW - Holding time
KW - Ni nanoparticle
KW - SiAlON
KW - Spark plasma sintering
UR - http://www.scopus.com/inward/record.url?scp=84859699967&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859699967&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.508.17
DO - 10.4028/www.scientific.net/KEM.508.17
M3 - Conference contribution
AN - SCOPUS:84859699967
SN - 9783037853764
T3 - Key Engineering Materials
SP - 17
EP - 20
BT - Materials Integration
PB - Trans Tech Publications Ltd
T2 - 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
Y2 - 1 December 2011 through 2 December 2011
ER -