W/NiFe phase interfacial characteristics of liquid-phase sintered W–Ni–Fe alloy

Reduction investigation of WO3/NiO/Fe2O3 and synthesis of nanocrystalline ternary W–Ni–Fe alloy

“…4. XRD examination clarifies only two phases in the composite, BCC structured W-rich phase and fcc structured NiFe-rich phase that reflected the successful synthesis of W-Ni-Fe alloy [3][4][5]10]. The average crystallite size of the synthesized W-Ni-Fe alloy was 44 nm for W and 36 nm for Fe-Ni as calculated from X-ray diffraction peaks using the following Scherer's formula [16],…”

“…Ternary W-Ni-Fe alloys may exhibit the key properties of the Fe-W and Ni-W alloys while eliminating the unwanted properties of the two-component alloys so they are important materials leading to many practical applications [9,10].…”

SPS densification behavior of W-5.6Ni-1.4Fe heavy alloy powders

“…6 and 7 show that density and W grain size as a function of sintering temperature for specimens sintered at a heating rate of 100 °C/min and with 5 min holding from the two types of powders. For the simply mixed powders, nearly full density of 17.4 g/cm 3 (theoretical density is 17.7 g/cm 3 ) is approached at about 1230 °C, but the maximum density is only 16.3 g/cm 3 (about 92% of theoretical density) for the as-milled powders when sintering temperature is 1100 °C. Furthermore, a parallel phenomenon happens in both of the powders, namely, density reversely decreases slightly at further higher temperature.…”

“…W-Ni-Fe heavy alloys (WHAs) have been widely used as kinetic energy penetrators, counter weights, radiation shields and electrical contacts, due to their higher density, better strength at elevated temperature, more excellent ductility and lower cost compared with other refractory metals [1][2][3]. Liquid-phase sintering of blended elemental powders of tungsten, nickel and iron at a temperature above 1460 °C is a conventional fabrication process for high density WHAs [4].…”

The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

“…Tungsten heavy alloys (WHAs) are promising materials for a wide range of applications in medical, military, and aerospace industries, such as radiation shields, kinetic energy penetrators, and counterbalance weights [1,2], due to their superior properties, such as high strength, high density, high radiation absorption, and good wear resistance [2][3][4]. In WHAs, nickel, iron, copper, and cobalt elements are commonly added to a tungsten matrix and serve as a binder phase, which helps in providing ductility to the materials [5][6][7]. In recent years, oxide dispersion strengthened (ODS) tungsten heavy alloys have attracted attention as potential high temperature structural materials [8][9][10][11][12].…”