Hi-Nicalon-S/α-Y₂Si₂O₇/SiC minicomposites were formed by polymer infiltration pyrolysis (PIP) and characterized by TEM, SEM fractography, tensile testing, and fiber push-in testing. All minicomposites with α-Y₂Si₂O₇ fiber coatings had strengths significantly higher than the control samples without fiber coatings. Extensive fiber pullout with debonding at the coating-fiber interface or within the coating itself was observed in minicomposites with Y₂Si₂O₇ fiber coatings, but no debonding was observed in minicomposites without fiber coatings. Debond energies of 4.5 ± 3, 4.6 ± 3 J/m² and average sliding stresses of 91 ± 40, 94 ± 40 MPa were measured by fiber push-in tests.

中文翻译：

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二硅酸钇纤维涂层对SiC / SiC微复合材料的评价

的Hi-NICALON-S /α-Y ₂的Si ₂ ö ₇ / minicomposites通过聚合物热解浸润（PIP）形成，并且其特征在于，TEM，SEM断口，拉力试验，和纤维推入测试的SiC。用α-Y所有minicomposites ₂的Si ₂ ö ₇纤维涂层具有强度大于不具有纤维涂层的对照样品显著更高。在具有Y ₂ Si ₂ O ₇纤维涂层的微型复合材料中，在涂层-纤维界面处或涂层本身内部发生了脱胶的大量纤维拉拔现象，但在没有纤维涂层的微型复合材料中未观察到脱胶现象。脱胶能为4.5±3，4.6±3 J / m ² 通过纤维推入测试测得的平均滑动应力为91±40、94±40 MPa。