Spark plasma sintering of Al2O3-Ni nanocomposites using Ni nanoparticles produced by rotary chemical vapour deposition

作者：Zhang Jianfeng^*; Tu Rong; Goto Takashi

来源：Journal of the European Ceramic Society, 2014, 34(2): 435-441.

DOI：10.1016/j.jeurceramsoc.2013.08.014

• Spark plasma sintering
• Al2O3-Ni nanocomposite
• Rotary chemical vapour deposition

Al2O3-Ni nanocomposites were fabricated by spark plasma sintering (SPS) using Ni nanoparticle produced by rotary chemical vapour deposition. Carbon-free Ni nanoparticles were prepared by reacting NiCp2 with O-2 to form NiO and then reducing to Ni by H-2 for 30 min at 823 K. The highest Ni content and grain size were 7.8 wt.% and 47.7 nm, respectively, using a NiCp2 supply rate (R-s) of 1.67 x 10(-6) kg s(-1). At a sintering temperature (T-sps) of 1573 K, the hardness of Al2O3-3.8 wt.% Ni was 20.5 GPa, around 1 GPa higher than that of monolithic Al2O3 sintered at the same temperature. The tensile strength of Al2O3-4.6 wt.% Ni was 170 MPa, 60 MPa higher than that of Al2O3 sintered at 1573 K.

• 出版日期2014-2