机构地区: 济南大学理学院
出 处: 《济南大学学报(自然科学版)》 2009年第3期225-228,共4页
摘 要: 研究Al2O3/TiC纳米和微米复合陶瓷刀具材料在800℃、1 000℃和1 250℃下的氧化行为,分析其氧化机理,并对其氧化产物进行了XRD分析。试验表明在同等氧化条件下纳米复合材料的氧化程度较微米复合材料严重。氧化后的残余强度测试表明:Al2O3/TiC纳米复合陶瓷刀具材料在800℃下氧化50 h后其抗弯强度虽有降低,但仍能满足切削刀具的要求,但在1 000℃和1 250℃下氧化50 h后,其抗弯强度有很大的下降,材料遭到破坏。 The oxidation behavior of Al2O3/TiC cutting tool materials (nanocomposite and microcomposite) are investigated at 800 ℃, 1 000 ℃ and 1 250 ℃, respectively. Experimental results indicate that Al2O3/TiC nanocomposite is more seriously oxidized than Al2O3/TiC mierocomposite at the same temperatures, and they obey similar oxidation laws. Flexural strength tests show that the flexural strength of Al2O3/TiC nanocomposite decreases slightly after oxidized at 800 ℃ for 50 h,but reduces greatly after oxidized at 1 000 ℃ and 1 250℃ X - ray analysis shows that TiO2 is produced during oxidation.
领 域: [金属学及工艺]