具有白钨矿涂层的 SiC/SiC 小型复合材料的界面性能。
Interfacial properties of SiC/SiC minicomposites with a scheelite coating.
机构信息
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
出版信息
Sci Rep. 2022 Dec 19;12(1):21950. doi: 10.1038/s41598-022-26626-9.
Unidirectional SiC/SiC minicomposite with a scheelite (CaWO) interphase coating was fabricated through the precursor infiltration and pyrolysis method. Fractography of the SiC/SiC minicomposites indicated that weak fiber/matrix bonding can be provided by the CaWO interphase. Furthermore, interfacial debonding stress of SiC/CaWO/SiC minicomposite was evaluated through the fiber push-out test, and estimated to be 80.7 ± 4.6 MPa. In-situ tensile SEM observation of SiC/CaWO/SiC minicomposite after oxidation at 1000-1100 °C was carried out, and thermal compatibility between CaWO interphase coating and SiC fiber or matrix after heat treatment at 1300 °C was investigated.
采用先驱体浸渍裂解法制备了具有白钨矿（CaWO）相间涂层的单向碳化硅/碳化硅小型复合材料。碳化硅/碳化硅小型复合材料的断口分析表明，CaWO 相间可以提供较弱的纤维/基体结合。此外，通过纤维推出试验评估了 SiC/CaWO/SiC 小型复合材料的界面脱粘应力，估计为 80.7±4.6MPa。在 1000-1100°C 氧化后对 SiC/CaWO/SiC 小型复合材料进行了原位拉伸 SEM 观察，并研究了 1300°C 热处理后 CaWO 相间涂层与碳化硅纤维或基体之间的热相容性。
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