以ZrO2-Alo2O3微-纳米复合陶瓷为研究对象,采用跟踪压痕裂纹法测试其裂纹扩展阻力曲线.结果表明,三种微-纳复合ZTA陶瓷的阻力曲线均为显著的上升曲线.成分相同、烧结温度高的试样和烧结温度相同、氧化锆含量少的试样,由于内晶颗粒数量多,阻力曲线的上升趋势更加明显.内晶颗粒附近区域产生位错网、亚晶界甚至微裂纹,使微-纳米复合ZTA陶瓷的断裂方式向穿晶断裂方向变化.裂纹穿晶扩展遇到的阻力大,所需要的裂纹扩展动力也大,形成开裂-止裂交替进行的裂纹扩展过程,故其阻力曲线上升明显.
参考文献
| [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(01):105-110. |
| [2] | Kathleen B;Alexander;Paul F et al.Grain growth kinetics in alumina-zirconia (CeZTA) composites[J].Journal of the American Ceramic Society,1994,77(04):939-946. |
| [3] | Niihara K J .New deaign concept of structural ceramics:ceramic nano-composites[J].Journal of the American Ceramic Society,1992,75(09):2363-2372. |
| [4] | 王昕,李镇江,杨丰科,侯耀永,周玉.单分散纳米水合氧化锆的制备[J].化工学报,1999(04):519-523. |
| [5] | 王昕,尹衍升,李镇江,杨静漪,周玉.溶胶-悬浮液混合制备ZrO2（n）-Al2O3纳米复合陶瓷[J].化工学报,1999(03):362-366. |
| [6] | 王昕,张景德,孙康宁,尹衍升,侯耀永,周玉.均分散纳米复合陶瓷的制备工艺[J].复合材料学报,1999(03):83-86. |
| [7] | Raddatz O;Schneider G A;Maekeus W .Bridging stresses and r-curves in ceramics/metal composites[J].Journal of the European Ceramic Society,2000,20:2261-2273. |
| [8] | Li C W;Lee D J;Lui S C .R-curve behavior and strength for ln-situ reinforced silicon nitrides with different microstrcture[J].Journal of the American Ceramic Society,1992,75(07):1777-1785. |
| [9] | Yu-Lin Wang;Umashankar Anandakumar;Raj N. Singh .Effect of fiber bridging stress on the fracture resistance of silicon-carbide-fiber/zircon composites[J].Journal of the American Ceramic Society,2000(5):1207-1214. |
| [10] | Meschke F.;Raddatz O. .R-Curve Behavior and Crack-Closure Stresses in Barium Titanate and (Mg,Y)-PSZ Ceramics[J].Journal of the American Ceramic Society,2000(2):353-361. |
| [11] | 王昕,单妍,于薛刚,徐静,尹衍升,周玉.纳米ZrO2-微米Al2O3复合陶瓷中"内晶型"结构的形成与机理[J].硅酸盐学报,2003(12):1145-1149. |
| [12] | 单妍,王昕,于薛刚,徐静,尹衍升,崔学民.Al2O3-ZrO2陶瓷体系中晶粒生长模型的研究[J].硅酸盐学报,2003(03):278-282. |
| [13] | 龚江宏.陶瓷材料断裂力学[M].北京:清华大学出版社,2001:253-254. |
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