Effects of binders on the microstructures and mechanical properties of ultrafine WC-10%AlxCoCrCuFeNi composites by spark plasma sintering

2019 ◽  
Vol 791 ◽  
pp. 540-549 ◽  
Author(s):  
Wenyan Luo ◽  
Yunzhong Liu ◽  
Junjian Shen
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Microstructures And Mechanical Properties

Preparation and Properties of β-SiAlON-cBN Composites Using Y2O3, B2O3 and Al as Additives

2014 ◽  
Vol 602-603 ◽  
pp. 380-383
Author(s):  
Chao He ◽  
Xiao Fei Shi ◽  
Xin Yan Yue ◽  
Jiang Jun Wang ◽  
Hong Qiang Ru
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Crack Deflection ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Microstructures And Mechanical Properties

SiAlON-cBN composites with different contents of cBN were consolidated by spark plasma sintering (SPS) at 1450°C using Y2O3, B2O3 and Al as additives. The effect of cBN content on the density, phase compositions, microstructures and mechanical properties of β-SiAlON-cBN composites was investigated. With increasing the cBN content, the density and hardness of β-SiAlON-cBN composites decreased. Fracture toughness could increase thanks to the crack deflection resulted from the cBN particles. For β-SiAlON-10 wt% cBN composites, the optimum hardness and highest relative density were 13 GPa and 96.4 %, respectively. For β-SiAlON-40 wt% cBN composites, the highest fracture toughness was KIC = 5.3 MPa∙m1/2.

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