6533b825fe1ef96bd1281da7
RESEARCH PRODUCT
Spark Plasma Sintering of Metallic Glasses
Yannick ChampionFrédéric BernardLoïc Perrièresubject
010302 applied physics[CHIM.MATE] Chemical Sciences/Material chemistryAmorphous metalMaterials scienceDiffusionComposite numberSinteringSpark plasma sintering02 engineering and technology[CHIM.MATE]Chemical Sciences/Material chemistry01 natural sciencesAmorphous solid020303 mechanical engineering & transportsDevitrification0203 mechanical engineering0103 physical sciencesComposite materialGlass transitionComputingMilieux_MISCELLANEOUSdescription
Spark plasma sintering (SPS) of metallic glasses (MG) can be quite different from sintering crystalline metallic alloys. Indeed, MG behave differently with increasing temperature, as they encounter a glass transition and devitrification. Their shaping can thus be compared to what can be performed on thermoplastic polymers. SPS is a promising way to prepare bulk parts from amorphous powders, since it allows very fast heating and cooling rates. It gives an advantage to avoid or limit devitrification of the amorphous phase upon the thermal cycle. However, diffusion mechanisms, which generally control densification, are activated at temperatures that are not compatible with MG structural integrity. From a manufacturing point of view, one has thus to find the best compromise to achieve full density and optimal properties without degrading the amorphous phase.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 |