Effect of the Mechanical Activation Time on the Density of Fine-Grained 90W-7Ni-3Fe Alloy Synthesized by Spark Plasma Sintering

被引：0
|
作者：
Chuvil'deev, V. N. [1 ]
Nokhrin, A. V. [1 ]
Boldin, M. S. [1 ]
Lantsev, E. A. [1 ]
Sakharov, N. V. [1 ]
机构：
[1] Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603022, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2023年 / 124卷 / 10期
关键词：
tungsten alloy; mechanical activation; sintering; diffusion; density; DENSIFICATION BEHAVIOR; HEAVY ALLOYS; TUNGSTEN;
D O I：
10.1134/S0031918X23601749
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of the high-energy mechanical activation (HMA) time on the microstructure of heavy tungsten 90% W-7% Ni-3% Fe alloy (VNZh-90) and its solid-phase sintering kinetics was studied. Alloy specimens were manufactured by vacuum spark plasma sintering (SPS). It has been shown that the density of alloy VNZh-90 depends on the HMA time nonmonotonically with a minimum. It has been demonstrated that the kinetics of the SPS of mechanically activated nanopowders has a two-stage character; the sintering rate depends on the Coble creep rate and the diffusion rate of W atoms in the crystal lattice of the nickel based gamma-phase.
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页码：987 / 994
页数：8
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