On the processing of nanocrystalline and nanocomposite ceramics
On the processing of nanocrystalline and nanocomposite ceramics
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DOI：
10.1016/s1359-6462(01)00884-3
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发表时间：
2001-05
影响因子：
6
通讯作者：
B. Kear;J. Colaizzi;W. Mayo;S. Liao
中科院分区：
文献类型：
--
作者：
B. Kear;J. Colaizzi;W. Mayo;S. Liao
两种方法正在开发用于生产纳米结构块体陶瓷。第一种方法利用热压来固结火焰合成的亚稳纳米粉末;利用压力诱导的相变来抑制固结过程中的晶粒生长。这个过程;被称为转化辅助固结（TAC），用于制备单相纳米陶瓷-纳米晶体陶瓷的测试样品。第二种方法利用聚集的粉末进料的等离子体喷涂以产生具有延长的固溶度的溅射淬火亚稳相。在这种情况下; TAC处理促进来自快速淬火材料的两个或更多个纳米相的共成核;这提供了限制烧结期间晶粒生长的附加机制。TAC处理的这种变体被用于制备多相纳米陶瓷-纳米复合陶瓷的测试样品。
Two methods are being developed for the production of nanostructured bulk ceramics. The first method utilizes hot pressing to consolidate a flame-synthesized metastable nanopowder; taking advantage of a pressure-induced phase transformation to suppress grain growth during consolidation. This process; called Transformation Assisted Consolidation (TAC), is being used to prepare test samples of single phase nanoceramics-nanocrystalline ceramics. The second method utilizes plasma spraying of an aggregated powder feed to generate a splat-quenched metastable phase with extended solid solubility. In this case; TAC processing promotes co-nucleation of two or more nanophases from the rapidly quenched material; which provides an additional mechanism to limit grain growth during sintering. This variant on TAC processing is being used to prepare test samples of multiphase nanoceramics-nanocomposite ceramics.