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陶瓷耐高温、耐腐蚀、耐磨,普遍认为是继金属、高分子树脂之后的第三种材料。但由于陶瓷硬而脆,加工非常困难,这是陶瓷用做结构材料所面临的最大难题。日本名古屋工业技术试验所最近发现氧化锆陶瓷也具有超塑性,可以像金属一样进行加工,这一发现将有力地促进陶瓷在各产业部门的应用。这种陶瓷称为“部分稳定化氧化锆陶瓷”,由3％(摩尔)氧化钇和氧化锆的固溶体粉末经常压烧结制成,其中的氧化钇以平均直径为0.3μ的微细结晶分散在氧化锆之中,这种氧化
Ceramic high temperature, corrosion resistance, wear resistance, generally considered to be following the metal, polymer resin after the third material. However, due to the hard and brittle ceramic, the processing is very difficult, which is the biggest problem facing ceramics used as structural materials. Japan Nagoya Industrial Technology Testing Institute has recently found that zirconium oxide ceramics are also superplastic, can be processed like metal, this finding will effectively promote the ceramic in various industrial sectors. This kind of ceramic is called “partially stabilized zirconia ceramic” and is made by the ordinary pressure sintering of solid solution powder of 3% by mole of yttrium oxide and zirconium oxide, in which yttrium oxide is dispersed in the form of fine crystals with an average diameter of 0.3μ Among zirconium, this oxidation