冷等静压对添加少量Al2O3的3Y-TZP陶瓷复合材料中氧化铝颗粒中二次纳米氧化锆包体形成的影响

2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP) Pub Date : 2018-09-01 DOI:10.1109/NAP.2018.8915299

L. Ahkozov, I. Danilenko, G. Volkova, V. Glazunova, V. Burkhovetski, T. Konstantinova, G. Lasko, S. Schmauder

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引用次数: 1

摘要

结果表明:3Y- TZP-2wt%A1203粉末在500mpa压实过程中，随着冷等静压值的增大，在氧化铝晶粒中形成二次纳米级氧化锆包裹体。这些包裹体的平均尺寸为60 nm。当压力值达到1000 MPa时，氧化锆纳米包体的数量增加。这种结构转变的原因显然没有明确的定义。讨论了两种可能的形成机制:在变形氧化铝晶体中向上扩散或在烧结过程中变形氧化铝颗粒的不规则凝固。

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Influence of Cold Isostatic Pressure on Formation of Secondary Nanoscale Zirconia Inclusions in Alumina Grains in Ceramic Composites 3Y-TZP with Small Amount of Al2O3

It was shown that the increasing cold isostatic pressure value during ball-milled 3Y- TZP-2wt%A1203 powder compaction up to 500 MPa lead to formation the secondary nanoscale zirconia inclusions in alumina grains. The mean size of such inclusions was 60 nm. Increasing pressure value up to 1000 MPa lead to increasing amount of zirconia nanoscale inclusions. The reason of such structure transformation clearly does not define. It was discussed two possible mechanisms of their formation: uphill diffusion in deformed alumina crystals or irregular coagulation of deformed alumina grains during sintering.

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2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)

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