TY - JOUR
T1 - Comparison of CVD-deposited Ni and dry-blended Ni powder as sintering aids for TiN powder
AU - Tu, Rong
AU - Zhu, Peipei
AU - Zhang, Song
AU - Xu, Peng
AU - Zhang, Lianmeng
AU - Hanekawa, Hiroshi
AU - Goto, Takashi
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China , Nos. 51102101 and 51272196 and the 111 Project (B13035), and a part of the Global COE Program of Materials Integration, Tohoku University, Japan. This research was also supported by the Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (A) , No. 22246082 .
PY - 2014/8
Y1 - 2014/8
N2 - Ni nanoparticles were precipitated on TiN powder via a rotary chemical vapour deposition (RCVD) method. The sintering behaviour and mechanical properties of the TiN, mixture of TiN and Ni, noted as TiN-Ni(blended), and Ni-precipitated TiN, noted as TiN-Ni(CVD), powders sintered by spark plasma sintering (SPS) were compared. The effects of O2 gas partial pressure (PO2) in RCVD and of sintering temperature in SPS (TS) on the crystalline phase, relative density (Dr), Vickers hardness (HV) and fracture toughness (KIC) of TiN-Ni(CVD)-sintered bodies were investigated. The mechanical properties of TiN ceramic were improved as CVD-deposited Ni as sintering aid for sintering. TiN-Ni(CVD) body-sintered at TS=1600°C from TiN-Ni(CVD) powder prepared at PO2=160 Pa exhibited the highest Dr of 97.9% and HV=15.5GPa, higher than those of TiN- and TiN-Ni(blended)-sintered bodies, and relatively high KIC=3.8MPam1/2.
AB - Ni nanoparticles were precipitated on TiN powder via a rotary chemical vapour deposition (RCVD) method. The sintering behaviour and mechanical properties of the TiN, mixture of TiN and Ni, noted as TiN-Ni(blended), and Ni-precipitated TiN, noted as TiN-Ni(CVD), powders sintered by spark plasma sintering (SPS) were compared. The effects of O2 gas partial pressure (PO2) in RCVD and of sintering temperature in SPS (TS) on the crystalline phase, relative density (Dr), Vickers hardness (HV) and fracture toughness (KIC) of TiN-Ni(CVD)-sintered bodies were investigated. The mechanical properties of TiN ceramic were improved as CVD-deposited Ni as sintering aid for sintering. TiN-Ni(CVD) body-sintered at TS=1600°C from TiN-Ni(CVD) powder prepared at PO2=160 Pa exhibited the highest Dr of 97.9% and HV=15.5GPa, higher than those of TiN- and TiN-Ni(blended)-sintered bodies, and relatively high KIC=3.8MPam1/2.
KW - Mechanical properties
KW - Partial pressure (PO2)
KW - Rotary chemical vapour deposition (RCVD)
KW - Spark plasma sintering (SPS)
KW - TiN
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U2 - 10.1016/j.jeurceramsoc.2013.12.050
DO - 10.1016/j.jeurceramsoc.2013.12.050
M3 - Article
AN - SCOPUS:84897665653
SN - 0955-2219
VL - 34
SP - 1955
EP - 1961
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 8
ER -
