Fine-grained 93W–5.6Ni–1.4Fe heavy alloys with enhanced performance prepared by spark plasma sintering

Fine-grained W-Ni-Fe heavy alloys (WHAs) with grain size of about 1-3μm were obtained by Spark Plasma Sintering (SPS) process. The composition of the alloy is consisted of 65 to 75 wt % W, with a Ni/Fe ratio ranging from zero to 7/3. In the lower sintering temperature range of 1100-1300°C, the WHAs showed the highest relative density of 98.6%, and when the sintering temperature was 1250 °C, the relative density of the WHAs prepared by the same techniques increased by decreasing of the content of W. Meanwhile the relative density of the alloy also increased with an increase of Ni /Fe ratio. The results show that the static tensile properties of the WHAs have a close relationship with the ratio of Ni / Fe. The tensile strength and the ductility of the sample W70-Ni21-Fe9 was 890 MPa and 3%. Furthermore, the dynamic compression strength of W70-Ni21-Fe9 was 1744 MPa.

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Preparation of Fine-Grained CeO2–SiC Ceramics for Inert Fuel Matrices by Spark Plasma Sintering

Inorganic Materials ◽

10.1134/s0020168520120018 ◽

2020 ◽

Vol 56 (12) ◽

pp. 1307-1313

Author(s):

L. S. Alekseeva ◽

A. V. Nokhrin ◽

M. S. Boldin ◽

E. A. Lantsev ◽

A. I. Orlova ◽

...

Keyword(s):

Spark Plasma Sintering ◽

Fine Grained ◽

Sic Ceramics ◽

Plasma Sintering ◽

Spark Plasma

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Superplasticity of fine-grained alumina obtained by spark plasma sintering

Journal of Physics Conference Series ◽

10.1088/1742-6596/1758/1/012031 ◽

2021 ◽

Vol 1758 (1) ◽

pp. 012031

Author(s):

A A Popov ◽

V N Chuvil’deev ◽

M S Boldin ◽

A V Nokhrin ◽

E A Lantsev ◽

...

Keyword(s):

Spark Plasma Sintering ◽

Fine Grained ◽

Plasma Sintering ◽

Spark Plasma

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Microstructure of Cu-TiB2 Nanocomposite during Spark Plasma Sintering

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.1113 ◽

2004 ◽

Vol 449-452 ◽

pp. 1113-1116 ◽

Cited By ~ 4

Author(s):

Young Soon Kwon ◽

Ji Soon Kim ◽

Jong Jae Park ◽

Hwan Tae Kim ◽

Dina V. Dudina

Keyword(s):

Spark Plasma Sintering ◽

Titanium Diboride ◽

Copper Matrix ◽

Microstructural Change ◽

Simultaneous Action ◽

Fine Grained ◽

Pulse Electric Current ◽

Plasma Sintering ◽

Spark Plasma ◽

Pulse Electric

Microstructural change of TiB2-Cu nanocomposite during spark plasma sintering (SPS) was investigated. Under simultaneous action of pressure, temperature and pulse electric current titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a interpenetrating phase composite with a fine-grained skeleton. Increase of SPS temperatures and holding times promotes the densification of sintered compacts due to local melting of copper matrix.

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Dielectric properties of fine-grained BaTiO3 prepared by spark-plasma-sintering

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2003.08.009 ◽

2004 ◽

Vol 83 (1) ◽

pp. 23-28 ◽

Cited By ~ 63

Author(s):

Baorang Li ◽

Xiaohui Wang ◽

Longtu Li ◽

Hui Zhou ◽

Xingtao Liu ◽

...

Keyword(s):

Dielectric Properties ◽

Spark Plasma Sintering ◽

Fine Grained ◽

Plasma Sintering ◽

Spark Plasma

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Mechanical Milling-Assisted Spark Plasma Sintering of Fine-Grained W-Ni-Mn Alloy

Materials ◽

10.3390/ma11081323 ◽

2018 ◽

Vol 11 (8) ◽

pp. 1323 ◽

Cited By ~ 1

Author(s):

Yanlin Pan ◽

Daoping Xiang ◽

Ning Wang ◽

Hui Li ◽

Zhishuai Fan

Keyword(s):

Spark Plasma Sintering ◽

Mechanical Milling ◽

Bending Strength ◽

Sintering Temperature ◽

Interface Fracture ◽

Composite Powders ◽

Fine Grained ◽

Plasma Sintering ◽

Binding Phase ◽

Spark Plasma

Fine-grained W-6Ni-4Mn alloys were fabricated by spark plasma sintering (SPS) using mechanical milling W, Ni and Mn composite powders. The relative density of W-6Ni-4Mn alloy increases from 71.56% to 99.60% when it is sintered at a low temperature range of 1000–1200 °C for 3 min. The spark plasma sintering process of the alloy can be divided into three stages, which clarify the densification process of powder compacts. As the sintering temperature increases, the average W grain size increases but remains at less than 7 µm and the distribution of the binding phase is uniform. Transmission electron microscopy (TEM) observation reveals that the W-6Ni-4Mn alloy consists of the tungsten phase and the γ-(Ni, Mn, W) binding phase. As the sintering temperature increases, the Rockwell hardness and bending strength of alloys initially increases and then decreases. The optimum comprehensive hardness and bending strength of the alloy are obtained at 1150 °C. The main fracture mode of the alloys is W/W interface fracture.

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