期刊文献+

纳米复合陶瓷增韧机理分析 被引量:40

ANALYSIS ON TOUGHENING MECHANISMS OF CERAMIC NANO-COMPOSITES
下载PDF
导出
摘要 分析研究了纳米复合陶瓷材料的断裂模式和应力场情况,提出纳米复合陶瓷韧性增加是主晶界强化和晶粒分化共同作用的结果。晶界纳米相能和基质形成高强度主晶界,从而对沿晶裂纹起强“钉扎”作用;晶内纳米相的增初作用在于形成有利于穿晶断裂的应力场,再加上微裂纹和次界面,使晶界得以强化,而基质晶粒趋向脆化。若纳米相过多,基体得到细化,但晶内纳米颗粒的应力作用更加突出,不利于断裂韧性的提高。 The fracture modes and residual stress of ceramic nano-compeites were studied. It is suggested that toughening of the nano-composites is a result which is combined by strengthening of main boundaries with brittle effect of matrix grains. The main boundaries possess much strong bonding because of intergranular nanoparticles, so it is mere effective to pin cracks. Toughening action of intragranular nanoparticles are formation of residual stress fields which is advantageous to cracks' trans granular propagation, and formation of microcracks and sub-grain boundaries. So the grain boundaries are strengthened but the matrix grains tend to brittleness. If the quantity of nanoparticles in the composites is excessive, the toughness of the materials would be decreased because stress effect in grains would be stronger despite finer grains.
出处 《陶瓷学报》 CAS 2000年第2期107-111,共5页 Journal of Ceramics
基金 国家自然科学基金!(编号:59742004)
关键词 纳米复合陶瓷 颗粒增韧 增韧机理 ceramic nano-composite, particulate toughening, toughening mechanism
  • 相关文献

参考文献14

  • 1王昕,孙康宁,尹衍升,候耀永,周玉.纳米复合陶瓷材料研究进展[J].复合材料学报,1999,16(1):105-110. 被引量:85
  • 2Hansson T.Warren R, Wasen J. Fracture Toughness Anisotropy and Toughening Mechanisms of a Hot-pressed Alumina Reinforced with Silicon Whiskers, J. Am. Ceram. Soc, 1993. 76(4): 841-848
  • 3周玉.陶瓷材料学.哈尔滨:哈尔滨工业大学出版社,1998.287
  • 4新原皓一 伊崎正宽 中平敦.高温超强度Si3N4-SiCナノ复合材料[J].粉体および粉末冶金,1990,37(2):352-356.
  • 5中平敦 福岛由晃 新原皓一.Al2O3-SiC-ZrO2复合セラミツクス[J].粉体および粉末冶金,1989,36(2):746-751.
  • 6Nihara K.New Dsign Concepts of Structured Ceramics-Matrix Nanocomposites. J Ceram. Soc.Jn,1991.99(10):947-982
  • 7焦绥隆,Bors.,CE.氧化铝/碳化硅纳米复合材料的力学性能和强化机理[J].材料导报,1996(A00):89-93. 被引量:13
  • 8王宏志,高濂,郭景坤.SiC颗粒尺寸对Al_2O_3-SiC纳米复合陶瓷的影响[J].无机材料学报,1999,14(4):679-683. 被引量:21
  • 9Ohji T. Hirano T, Nakahira A. et al. Particle/Matrix Interface And Its Role in Creep Inhibition in Alumina/Silico Carbide Nanocomposites.J.Am.Ceram.Soc, 1996.79(1):33-45
  • 10孙东立,周朝霞,杨德庄,平德海,李斗星.Si_3N_4/SiC纳米复合陶瓷的微观结构[J].材料科学与工艺,1998,6(3):97-100. 被引量:4

二级参考文献17

共引文献117

同被引文献439

引证文献40

二级引证文献197

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部