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Journal of Materials Engineering and Performance

Erschienen in:

01.12.2015

The Effect of Processing Parameters on the Performance of Spark Plasma Sintered cBN-WC-Co Composites

verfasst von: Cong Mao, Mingjun Zhang, Jian Zhang, Kun Tang, Hangyu Gan, Gaofeng Zhang

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 12/2015

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Abstract

Cubic boron nitride (cBN) particles were mixed into superfine tungsten carbide (WC), and then cBN-WC-cobalt (Co) composites were prepared using spark plasma sintering method. The influence of the processing parameters on the microstructures and the mechanical properties of the cBN-WC-Co composites were investigated. The results indicated that the cBN particles arranged uniformly and had an excellent adhesion with WC matrix. There was no evidence of phase transformation from cBN to hBN. With the increasing of the sintering temperature, the liquid-phase Co was increased and entered the micro-pores between WC and cBN particles easily. Correspondingly, the density, the flexural strength, and the hardness of the cBN-WC-Co composites also increased. With the further increasing of the sintering temperature, WC grains grew leading to the reduction of the hardness. Therefore, the hardness of the samples increased to a maximum value of 2978 HV at 1250 °C, and then decreased with the sintering temperature. The experimental results also showed that the density, the flexural strength, and the hardness of cBN-WC-Co composites increased with the holding time, whereas the hardness presented a decreasing tendency when the holding time exceeded 7 min.

Vorheriger Artikel Microstructure and Tensile Properties of Mg (AM60)/Al2O3 Metal Matrix Composites with Varying Volume Fractions of Fiber Reinforcement

Nächster Artikel Dislocation Configurations and Stress Distribution Along the Transverse Axis of Turbine Blade Body

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Titel: The Effect of Processing Parameters on the Performance of Spark Plasma Sintered cBN-WC-Co Composites
verfasst von: Cong Mao
Mingjun Zhang
Jian Zhang
Kun Tang
Hangyu Gan
Gaofeng Zhang
Publikationsdatum: 01.12.2015
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 12/2015
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-015-1777-6

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