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Processing and Testing of RE2Si2O7 Fiber-Matrix Interphases for SiC-SiC Composites
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| 【文章作者】Boakye, Emmanuel E.;Mogilevsky, Pavel;Parthasarathy, Triplicane A.;Keller, Kristin A.;Hay, Randall S |
| 【文章摘要】 Rare-earth disilicates (RE2Si2O7) are investigated for use as oxidation-resistant alternatives to carbon or BN fiber-matrix interphases in ceramic matrix composites (CMC). Dense , , -Y2Si2O7, and -Ho2Si2O7 pellets were formed at 64MPa and 1050 degrees C-1200 degrees C for 1h using the field-assisted sintering technique (FAST). Pellet modulus was measured using nanoindentation, and Vickers hardness was measured at loads of 100, 500, and 1000g. The sliding stress of SCS-0 SiC fibers incorporated in -, -, and -RE2Si2O7 matrices were measured by fiber push-out. Deformation of RE2Si2O7 after indentation and after fiber push-out was characterized by TEM. Implications of the results for use of RE2Si2O7 as a fiber-matrix interphase in CMCs are discussed. |
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【卷】99 【ISSUE】2 【ISSUEID】815B0005
【文章期份】2016
【发布日期】2016/8/11 17:03:29
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