Details

Autor(en) / Beteiligte

• Chen, Q.
• Tang, C.Y.
• Chan, K.C.
• Liu, L.

Titel

Viscous flow during spark plasma sintering of Ti-based metallic glassy powders

Ist Teil von

• Journal of alloys and compounds, 2013-04, Vol.557, p.98-101

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► A single mechanism for spark plasma sintering of BMGs is proposed. ► Full densification of BMGs can be achieved through two distinct shrinkage steps. ► The activation energy for viscous flow in sintering was calculated. ► The applied compressive stress is vital for fully dense samples. Viscous flow has rarely been observed in solid-state sintering of metal, while operates the dominant mass transport mechanisms in vitreous materials. In the present study, Ti-based bulk metallic glasses (BMGs) with nearly 100% relative density were fabricated by spark plasma sintering of a gas-atomized Ti48Ni32Cu8Si8Sn4 glassy alloy powder. Two main shrinkage stages of densification occurred at a constant heating rate. Based on the analysis of experimental data and microstructure observations of samples sintered at various temperatures, sintering mechanisms are proposed for the sintering of Ti-based metallic glassy powders in light of the viscous flow model.