Fabrication of W-ZrC Cermets by Reactive Melt Infiltration with Polycarbosilane as Preforms’ Adhesive

Shou Ming Zhang; Song Wang; Yu Lin Zhu; Zhao Hui Chen

doi:10.4028/www.scientific.net/MSF.675-677.819

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HomeMaterials Science ForumMaterials Science Forum Vols. 675-677Fabrication of W-ZrC Cermets by Reactive Melt...

Fabrication of W-ZrC Cermets by Reactive Melt Infiltration with Polycarbosilane as Preforms’ Adhesive

Abstract:

Polycarbosilane (PCS) was introduced into preforms to prepare W-ZrC cermets by reactive melt infiltration (RMI). Properties and microstructure of the preforms and cermets were analyzed with XRD, SEM and EDS. The preforms had an open porosity of 42.0 %, and the WC particles were cemented by the pyrolysate of PCS. W-ZrC cermets were prepared by heating Zr2Cu covered preforms to 1300 °C for 3 h. XRD revealed that the resulting cermets were made up of W, ZrC and W2C. The cermets had an open porosity of 3.5 %, a flexural strength of 354.0 MPa, a flexural modulus of 192.5 GPa and a flexural toughness of 5.72 MPa·m1/2 .

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Materials Science Forum (Volumes 675-677)

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819-822

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https://doi.org/10.4028/www.scientific.net/MSF.675-677.819

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February 2011

Authors:

Shou Ming Zhang, Song Wang, Yu Lin Zhu, Zhao Hui Chen

Keywords:

Microstructure, Polycarbosilane, Reactive Melt Infiltration, W-ZrC Cermet

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