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首页> 外文期刊>Key Engineering Materials >(PyC/SiC)n and (BN/SiC)n Nanoscale-Multilayered I nterphases by Pressure Pulsed-CVI
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(PyC/SiC)n and (BN/SiC)n Nanoscale-Multilayered I nterphases by Pressure Pulsed-CVI

机译：压力脉冲CVI制备（PyC / SiC）n和（BN / SiC）n纳米多层反相

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摘要

Pyrocarbon / silicon carbide (PyC/SiC). and boron nitnde / silicon carbide (BN/SiC). nanoscale multilayers have been fabricated by pressure pulsed-CVI (P-CVI). Pyrocarbon, boron nitride and silicon carbide were deposited from C3H8, BC13- NH3 and MTS-H2 gas precursors, respectively. Such nanoscale multilayers were used as interphases in SiC/SiC minicomposites, manufactured by P-CVI and reinforced by Hi-Nicalon fibres. The stress-strain behaviour under tension at room temperature, and the lifetime in static fatigue at high temperatures in air were investigated. The minicomposites exhibited improved mechanical properties and oxidation resistance in comparison to their counterparts having a single layer of pyrocarbon or boron nitride as interphase. The multilayered interphases allows the control of fibre / matrix interactions and the oxidation resistance.
机译：焦碳/碳化硅（PyC / SiC）。和氮化硼/碳化硅（BN / SiC）。通过压力脉冲CVI（P-CVI）制备了纳米级多层。分别从C3H8，BC13-NH3和MTS-H2气体前体中沉积了热解碳，氮化硼和碳化硅。这种纳米级多层被用作由P-CVI制造并由Hi-Nicalon纤维增强的SiC / SiC微型复合材料的中间相。研究了室温下在张力下的应力-应变行为，以及在空气中高温下静态疲劳的寿命。相比于具有单层热碳或氮化硼作为相间相的同行，微型复合材料表现出改善的机械性能和抗氧化性。多层界面可以控制纤维/基体的相互作用和抗氧化性。

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