ZHANG Qinjian, WU Chunli, *LI Min, ZHANG Qinhe, QIN Yong, BI Jinzi, ZHANG Jianhua, LIU Yu
(Shandong University, * Tongji University)
Abstract: Experimental results for bending strength of AI2O3 - coated engineering ceramics were analyzed using mathematical method. The principle and method for estimating general bending strength of engineering ceramics using results obtained from a limited quantity of specimens were described and the physical significance of the distribution characteristic parmeters was discussed. It has been found that the left boundary value μ左 of confidence strength intervals presents the average value of overall bending strength and the right boundary value σ右 of mean square deviation characterizes the dispersal level of material strength . These two parameters ilustrate the strength lever of engineering ceramics reliably and can be used as the index for evaluating the stength properties of material . The results after mdifying the engineering ceramics were also analyzed in this paper.
Key words: sol - gel method, Al2O3 - coated engineeing ceramics, bending strength, mathematical analysis