具有接近共价材料的抗慢裂纹扩展性能的纳米结构陶瓷氧化物。

Nanostructured ceramic oxides with a slow crack growth resistance close to covalent materials.

作者信息

Chevalier J, Deville S, Fantozzi G, Bartolomé J F, Pecharroman C, Moya J S, Diaz L A, Torrecillas R

机构信息

Materials Department (UMR CNRS 5510), National Institute for Applied Sciences, 20 Avenue Albert Einstein, 69621 Villeurbanne, France.

出版信息

Nano Lett. 2005 Jul;5(7):1297-301. doi: 10.1021/nl050492j.

DOI:10.1021/nl050492j

PMID:16178227

Abstract

Oxide ceramics are sensitive to slow crack growth because adsorption of water can take place at the crack tip, leading to a strong decrease of the surface energy in humid (or air) conditions. This is a major drawback concerning demanding, long-term applications such as orthopaedic implants. Here we show that a specific nanostructuration of ceramic oxides can lead to a crack resistance never reached before, similar to that of covalent ceramics.

摘要

氧化物陶瓷对缓慢裂纹扩展敏感，因为水可在裂纹尖端吸附，导致在潮湿（或空气）条件下表面能大幅降低。这对于诸如骨科植入物等要求苛刻的长期应用来说是一个主要缺点。在此我们表明，陶瓷氧化物的特定纳米结构可导致前所未有的抗裂性，类似于共价陶瓷的抗裂性。