Spark plasma sintering of Al2O3–Ni nanocomposites using Ni nanoparticles produced by rotary chemical vapour deposition
Spark plasma sintering of Al2O3–Ni nanocomposites using Ni nanoparticles produced by rotary chemical vapour deposition
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DOI：
10.1016/j.jeurceramsoc.2013.08.014
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发表时间：
2014-02
影响因子：
5.7
通讯作者：
Jianfeng Zhang;R. Tu;T. Goto
中科院分区：
文献类型：
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作者：
Jianfeng Zhang;R. Tu;T. Goto
采用放电等离子烧结（SPS）技术，以旋转化学气相沉积法制备的Ni纳米颗粒为原料，制备了Al 2 O3-Ni纳米复合材料。采用NiCp 2与O2反应生成NiO，然后在823 K下用H2还原30 min制备无碳Ni纳米粒子。最高Ni含量和晶粒尺寸为7.8wt.%和47.7 nm，使用1.67 × 10 - 6 kg s-1的NiCp 2供应速率（Rs）。在1573 K的烧结温度（TSPS）下，Al 2 O3 -3.8 wt.% Ni为20.5GPa，比同温度下烧结的Al 2 O3高约1GPa。Al 2 O3 -4.6 wt.%的抗拉强度在1573 K烧结时，Ni的抗压强度为170 MPa，比Al 2 O3的抗压强度高60 MPa。
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 NiCp2with O2to form NiO and then reducing to Ni by H2for 30 min at 823 K. The highest Ni content and grain size were 7.8 wt.% and 47.7 nm, respectively, using a NiCp2supply rate (Rs) of 1.67 × 10−6kg s−1. At a sintering temperature (TSPS) of 1573 K, the hardness of Al2O3–3.8 wt.% Ni was 20.5 GPa, around 1 GPa higher than that of monolithic Al2O3sintered at the same temperature. The tensile strength of Al2O3–4.6 wt.% Ni was 170 MPa, 60 MPa higher than that of Al2O3sintered at 1573 K.