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Fonctionnalisation de Surface de Verres Métalliques Base Zirconium

Paul Hervier

出版	2017
URL	http://books.google.com.hk/books?id=Ceog0AEACAAJ&hl=&source=gbs_api

註釋

Metallic glasses are recent materials. First developed in the 60s, they are well-known for their high mechanical resistance and their ability to become viscous at relatively low temperatures. Functionalization of their surfaces is a promising way to further increase their properties. However, their amorphous structure is in a metastable state and maintaining them at too high temperatures leads systematically to their crystallization, and thus the loss of their unique properties. Most of surface treatment techniques are performed at high temperatures and thus are not adapted to these materials. In this work, two innovative techniques which are thermoforming and ultra-short pulse duration laser treatment have been used and allow to texture the surfaces of the alloys by avoiding their crystallization. This thesis is focused on the effect of these two processing techniques on physical and chemical properties of Zr-based bulk metallic glasses and thus on the modification of their surface properties such as wettability or corrosion resistance. We will see that both techniques present their advantages and can be particularly adapted for biomedical applications.