Approach of the spark plasma sintering mechanism in Zr57Cu20Al10Ni8Ti5 metallic glass
作者： Sophie Nowak , Loïc Perrière , Lucas Dembinski , Sandrine Tusseau-Nenez , Yannick Champion
DOI: 10.1016/J.JALLCOM.2010.09.158
关键词: Amorphous metal 、 Particle size 、 Sintering 、 Devitrification 、 Metallurgy 、 Welding 、 Powder metallurgy 、 Spark plasma sintering 、 Materials science 、 Amorphous solid
摘要: Abstract Spark plasma sintering (SPS) was used to sinter gas-atomized Zr 57 Cu 20 Al 10 Ni 8 Ti 5 amorphous powder. Systematic analyses were performed study particle size and annealing time effects on the parts structure properties. Partial devitrification particles welding observed correlated thermal conditions. Mechanical testing, through compression micro-hardness, reveals that sintered show strength similar a quenched bulk metallic glass damaging before failure. However, pulsed current input does not seem most relevant way powders: during initial stages (when necks are small), excessive over-heating is generated in vicinity of necks, responsible for partial devitrification; further at large leads complete densification. Effects stress, thermo- electro-transports evaluated provide better understanding SPS mechanisms densification glasses.
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