首页|Thermal shock resistance and toughening mechanism of W/Ta and W/TiN/Ta laminated composites
Thermal shock resistance and toughening mechanism of W/Ta and W/TiN/Ta laminated composites
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NSTL
Elsevier
? 2022 Elsevier LtdThe brittleness of tungsten (W) is a significant limitation on its widespread applications as a high-temperature structural material. Laminated composite technology proved to be an effective method to improve the toughness of W. In this work, W/Ta and W/TiN/Ta laminated composites were prepared by spark plasma sintering (SPS) to overcome the brittleness of W. The toughening properties of the W/Ta and W/TiN/Ta laminated composites were evaluated by electron beam thermal shock and laser thermal diffusivity testing. The toughening mechanism was clarified by scanning electron microscopy, electron probe micro-analysis, and transmission electron microscopy. After the three-point bending test, interfacial debonding was observed predominantly at the incoherent W-TiN rather than at the semi-coherent Ta-TiN interfaces. At 0.30 GW/m2 of electron beam thermal shock, the average width and depth of thermal shock cracks in the W/Ta laminated composite were ~ 9.4 μm and ~ 30.0 μm, respectively, which were much smaller than those in the W/W laminates and W/TiN/Ta laminated composite.
Xu G.、Yan Z.、Lu H.、Cai J.、Wang R.、Cai C.、Suo J.、Feng F.
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State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology
NSTL
Elsevier
