Mechanical and physical properties of bulk metallic glass for biological use


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2016-2018

FUNDING AMOUNT

150000.0 CNY

ABSTRACT

Metallic glasses are amorphous solids formed by cooling a metallic melt fast enough to avoid crystallization. Metallic glasses show a series of attractive properties as promising functional materials owing to their special mechanical, physical and chemical properties. Bulk metallic glasses exhibit several superior properties, compared to their corresponding crystalline counterpart, such as high strength, high elastic limit or good corrosion resistance. This feature is very attractive for thermo-processing in a lower temperature domain, in a similar way to what is conducted in oxide glasses or amorphous polymers. However, most of bulk amorphous alloys are fabricated by the traditional casting methods. Their shape and size are seriously limited for alloys with low glass forming ability, and impedes the potential application of these materials. Therefore another route is to density amorphous powders. Combined with the spark plasma sintering (SPS) technique, which can improve the glass forming ability of the metallic glasses. Basically, SPS technique has been widely used in preparation of ceramics and traditional metals. In the current research, bulk metallic glasses would be prepared by SPS method. Firstly, the dimension of the metallic glasses prepared by SPS technique is suitable to the biomaterials. Secondly, based on our previous research, the mechanical and physical properties of the metallic glasses elaborated by SPS technique are attractive to the biomaterials. In the current project, we aim at preparing the bulk metallic glasses (Ni, Be and Co elements are not included) by SPS technique, the process parameters, crystallization behaviors and thermal stability of the metallic glasses could be investigated. Finally, the mechanical and physical properties of the metallic glasses prepared by SPS technique could be investigated. We want to explore the preparing process based on this project. More... »

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