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SiC纖維增強鈦基復(fù)合材料的橫向力學(xué)性能
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國家自然科學(xué)基金（50371069）和航空科學(xué)基金(04G53044)資助


Transverse Mechanical Properties of Continuous SiC Fiber Reinforced Titanium Matrix Composites
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    摘要:

    采用十字形試樣測試分析有C涂層和無C涂層兩種SiC纖維增強鈦基復(fù)合材料的橫向力學(xué)性能，以橫向載荷作用下應(yīng)力-應(yīng)變曲線上的非線性拐點計算界面的強度。結(jié)果表明，有C涂層的界面橫向開裂強度為53 MPa，低于無C涂層的界面開裂強度196 MPa，并且前者在橫向載荷作用下沿C涂層與纖維之間開裂，而后者沿反應(yīng)生成物與基體間開裂；體積分數(shù)為30%的多根纖維鈦基復(fù)合材料的非線性拐點應(yīng)力低于單根纖維復(fù)合材料，這主要是由于殘余應(yīng)力的減少引起，界面強度并沒有明顯變化

    Abstract:

    Transverse mechanical properties of TMCs reinforced by two types of SiC fibers with and without C coating were determined by use of cross-shaped specimens. The initial nonlinear stress of the stress-strain curve under the applied transverse tensile load was adopted to calculate the interface strength. The interface strength with C coating was 53 MPa which was lower than 196 MPa of the one without C coating. The debonding position of two interface were different, i.e. the former was between the fiber and C coating, but the latter was between the matrix and reaction products. The initial nonlinearity stress of TMCs reinforced by multiple fibers with 30% volume fraction was lower than that of single fiber reinforced TMCs, which was caused by the decrease of residual stress on the surface of fiber, and the interface strength was not influenced by the more additional fibers

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李建康,楊延清,羅 賢,張榮軍. SiC纖維增強鈦基復(fù)合材料的橫向力學(xué)性能[J].稀有金屬材料與工程,2009,38(3):426~430.[Li Jiankang, Yang Yanqing, Luo Xian, Zhang Rongjun. Transverse Mechanical Properties of Continuous SiC Fiber Reinforced Titanium Matrix Composites[J]. Rare Metal Materials and Engineering,2009,38(3):426~430.]
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  • 收稿日期:2008-02-11
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