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超塑性氧化鋁陶瓷

關(guān)鍵詞 超塑性 , 氧化鋁 , 陶瓷|2010-03-15 00:00:00|來源 中國磨料磨具網(wǎng)
摘要 氧化鋁陶瓷廣泛用作研磨材,切削材、高溫材料,加之具有良好的耐磨蝕性、機械強度、硬度和耐磨性,還用于各種機械部件。但原用氧化鋁陶瓷由于無塑性,不能像金屬材料那樣進行加工,可以說屬一種...
  氧化鋁陶瓷廣泛用作研磨材,切削材、高溫材料,加之具有良好的耐磨蝕性、機械強度、硬度和耐磨性,還用于各種機械部件。但原用氧化鋁陶瓷由于無塑性,不能像金屬材料那樣進行加工,可以說屬一種很難加工的材料。
  近期,日本科學技術(shù)廳金屬材料研究所開發(fā)出一種可進行精密加工的高塑性氧化鋁陶瓷。據(jù)介紹,這種陶瓷是在高分子中電解質(zhì)水溶液中分散AI2O3和Zr2O3顆粒,制備料漿,注入多孔質(zhì)模,加壓成坯,加熱燒結(jié)而成。由于它是一種含有Zr2O3的氧化鋁結(jié)拼燒結(jié)體,Zr2O3氧化鋁顆粒處于高分散狀態(tài),且結(jié)晶呈微細粒,具有良好的超塑性。經(jīng)測定,在1400℃和1500℃下,以1mm/min的速度進行拉伸形試驗,其測定值超過200%。由于它彌補了原有氧化鋁陶瓷無塑性的缺陷,使其用途得到進一步拓寬
  
  信息來源:中國地產(chǎn)網(wǎng)
  
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