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材料工程  2012 

Si3N4/TiC纳米复合陶瓷材料R曲线行为

, PP. 76-80

Keywords: 氮化硅,阻力曲线,纳米复合陶瓷,压痕-强度

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Abstract:

在微米Si3N4基体中加入亚微米Si3N4及纳米TiC颗粒,热压烧结制备出力学性能良好的Si3N4/TiC纳米复合陶瓷材料。采用压痕-弯曲强度法测定了复合材料的裂纹扩展阻力曲线(R曲线)。结果表明材料呈现出上升的阻力曲线特性,显示出增强的抗裂纹扩展能力。其中,加入质量分数为10%亚微米Si3N4颗粒和15%纳米TiC颗粒的复合材料显示出较为优越的抗裂纹扩展能力,其阻力曲线上升最陡,上升幅度最大。分析表明弥散的TiC粒子同基体之间弹性模量和热膨胀失配以及Si3N4类晶须拔出与桥联补强协同增韧,有助于纳米复合材料抑制主裂纹失稳扩展,导致复合材料的阻力曲线行为。

References

[1]  FVNFSCHILLING S, FETT T, HOFFMANN M J, et al. Bridging stresses from R-curves of silicon nitrides[J]. Journal of Materials Science, 2009, 44(14): 3900-3904.
[2]  YE F, LIU L M, ZHANG H J, et al. Thermal shock behavior of 30 wt% BAS/Si3N4 self-reinforced composite[J]. Journal of Alloys and Compounds, 2010, 493(1-2): 272-275.
[3]  FVNFSCHILLING S, FETT T, OBERACKER R, et al. R curves from compliance and optical crack-length measurements[J]. Journal of the American Ceramic Society, 2010, 93(9): 2814-2821.
[4]  KRUZIC J J, SATET R L, HOFFMANN M J, et al. The utility of R-curves for understanding fracture toughness-strength relations in bridging ceramics[J]. Journal of the American Ceramic Society, 2008, 91(6): 1986-1994.
[5]  LAUNEY M E, RITCHIE R O. On the fracture toughness of advanced materials[J]. Advanced Materials, 2009, 21(20): 2103-2110.
[6]  OLIVEIRA A J, DINIZ A E, URSOLINO D J. Hard turning in continuous and interrupted cut with PCBN and whisker-reinforced cutting tools[J]. Journal of Materials Processing Technology, 2009, 209(12-13): 5262-5270.
[7]  LIN H B, CAO M S, ZHAO Q L, et al, Mechanical reinforcement and piezoelectric properties of nanocomposites embedded with ZnO nanowhiskers[J]. Scripta Materialia, 2008, 59(7): 780-783.
[8]  王昕, 于薛刚, 单妍, 等. 纳米ZrO2与微米Al2O3复合陶瓷的断裂c模式[J]. 材料研究学报,2007, 21(5):482-486.
[9]  昝青峰, 黄勇, 汪长安, 等. 长柱状β-Si3N4晶粒与 SiC 晶须在层状Si3N4/BN 复合材料中的作用[J]. 材料工程,2001,(5): 22-26.
[10]  龚江宏. 陶瓷材料断裂力学[M]. 北京:清华大学出版社, 2001.255.
[11]  RALPH F, KRAUSE J R. Rising fracture toughness from the bending strength of indented alumina beams[J]. Journal of the American Ceramic Society , 1988, 71(5): 338-343.
[12]  ANSTIS G R, CHANTIKUL P, LAWN B R, et al. A critical evaluation of indentation techniques for measuring fracture toughness: I, direct crack measurements[J]. Journal of the American Ceramic Society, 1981, 64(9):533-538.
[13]  CALIS ACIKBAS N, KUMAR R, KARA F, et al. Influence of β-Si3N4 particle size and heat treatment on microstructural evolution of α:β-SiAlON ceramics[J]. Journal of the European Ceramic Society, 2011, 31(4): 629-635.
[14]  SILVESTRONI L, SCITI D, MELANDRI C, et al. Toughened ZrB2-based ceramics through SiC whisker or SiC chopped fiber additions[J]. Journal of the European Ceramic Society , 2010, 30(11): 2155-2164.

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