Effect of drying methods of alumina powder and grapheme oxide mixture on the mechanical and electrical properties of sintered composites obtained by spark plasma sintering

2018 ◽  
Author(s):  
P. V. Fokin ◽  
◽  
N. W. Solis Pinargote ◽  
E. V. Kuznetsova ◽  
P.Y. Peretyagin ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Spark Plasma Sintering ◽  
Drying Methods ◽  
Alumina Powder ◽  
Oxide Mixture ◽  
Mechanical And Electrical Properties ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Preparation and properties of B4C-TiB2 ceramics prepared by spark plasma sintering

2020 ◽  
Author(s):  
Jingzhe Fan ◽  
Weixia Shen ◽  
zhuangfei Zhang ◽  
Chao Fang ◽  
Yuewen Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Electrical Properties ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Composite Ceramics ◽  
Powder Mixtures ◽  
Mechanical And Electrical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ceramic Density

Abstract By doping titanium hydride (TiH2) into boron carbide (B4C), a series of B4C + x wt% TiH2 (x = 0, 5, 10, 15 and 20) composite ceramics were obtained through spark plasma sintering (SPS). The effects of sintering temperature and the amount of TiH2 additive on the microstructure, mechanical and electrical properties of the sintered B4C-TiB2 composite ceramics were investigated. Powder mixtures of B4C with 0−20 wt% TiH2 were heated from 1400 to 1800 °C for 20 minutes under 50 MPa. The results indicated that higher sintering temperatures contributed to greater ceramic density. With increasing TiH2 content, titanium diboride (TiB2) formed between the TiH2 and B4C matrix. This effectively improved Young’s modulus and fracture toughness of the composite ceramics, significantly improving their electrical properties: the electrical conductivity reached 114.9 S·cm−1 at 1800 °C when x = 20. Optimum mechanical properties were obtained for the B4C ceramics sintered with 20 wt% TiH2, which had a relative density of 99.9 ± 0.1%, Vickers hardness of 31.8 GPa and fracture toughness of 8.5 MPa·m1/2. The results indicated that the doping of fine Ti particles into the B4C matrix increased the conductivity and the fracture toughness of B4C.

Enhanced electrical properties of ZnO varistor ceramics by spark plasma sintering: Role of annealing

2020 ◽  
Vol 46 (10) ◽  
pp. 15076-15083 ◽  
Author(s):  
Jie Liang ◽  
Xuetong Zhao ◽  
Jianjie Sun ◽  
Lulu Ren ◽  
Ruijin Liao ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Spark Plasma Sintering ◽  
Zno Varistor ◽  
Plasma Sintering ◽  
Spark Plasma
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