TECHNOLOGICAL WAYS TO CREATE COMPOSITE MATERIALS BASED ON HEAT-RESISTANT REFRACTORY COMPOUNDS (review)

2021 ◽  
pp. 12-20
Author(s):  
A.V. Shestakov ◽  
◽  
M.M. Karashaev ◽  
N.S. Dmitriev ◽  
◽  
...  
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Thermomechanical Processing ◽  
Technological Plasticity ◽  
Heat Resistant ◽  
System A ◽  
Refractory Compounds ◽  
Similar Materials ◽  
Powder Metallurgy Methods ◽  
Rocket Technology

The article discusses the main technological approaches to obtain heat-resistant and heat-resistant materials based on compounds in the Ni–Al system in order to use them in promising products of aviation and rocket technology. It is shown that when receiving materials based on compounds in the Ni-Al system, a phase of eutectic origin is formed based on the Ni3Al compound, which reduces the technological plasticity of the alloys of this system. The use of powder metallurgy methods eliminates such phases in the structure of alloys obtained using granule metallurgy technology, as well as with the use of special methods of powder metallurgy. Technological approaches are presented to obtain similar materials using powder metallurgy methods combined with thermomechanical processing.

Measurements of friction and wear of powder composite materials by the «pin-on-disc» mechanism

2020 ◽  
pp. 60-63
Author(s):  
F. F. Yusubov
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Optical Microscope ◽  
Wear Properties ◽  
Pin On Disc ◽  
Dry Mixing ◽  
Friction And Wear Properties ◽  
Powder Metallurgy Methods

In this study, friction and wear properties of friction composite materials which is developed by powder metallurgy methods was examined.The technological sequence such as grinding, dry mixing, pressing and sintering wereused in the manufacturing of materials. The tribological properties of the obtained specimens were studied on a vertical machine MMW-1 using the «pin-on-disc» mechanism. The optical microscope Amscope was used to analyze the wear surfaces.

Calculation of plasma centrifugal spraying parameters of fine granules of heat-resistant nickel alloys

2020 ◽  
pp. 471-474
Author(s):  
M.G. Yagodin ◽  
E.I. Starovoytenko
Keyword(s):  
Powder Metallurgy ◽  
Nickel Alloys ◽  
Dynamic Pressure ◽  
Calculated Data ◽  
Powder Size ◽  
Metal Powders ◽  
Heat Resistant ◽  
Gas Dynamic ◽  
Spraying Parameters ◽  
Wide Range

The equipment for the production of wide range of metal powders purposed for powder metallurgy is described. The possibility for producing of powders by the plasma centrifugal spraying is considered taking into account the gas dynamic pressure. The calculated data on the powder size for different materials are given.

scholarly journals Highly porous, hierarchically structured nickel nanomaterials consolidated by powder metallurgy methods

2021 ◽  
Vol 1942 (1) ◽  
pp. 012019
Author(s):  
A G Gnedovets ◽  
V A Zelensky ◽  
A B Ankudinov ◽  
V S Shustov ◽  
M I Alymov
Keyword(s):  
Powder Metallurgy ◽  
Powder Metallurgy Methods ◽  
Highly Porous

Structural Effects of Thermomechanical Processing on the Static and Dynamic Responses of Powder Metallurgy Fe-Mn-Si Based Shape Memory Alloys

2016 ◽  
Vol 97 ◽  
pp. 153-158 ◽  
Author(s):  
Elena Mihalache ◽  
Bogdan Pricop ◽  
Radu Ioachim Comăneci ◽  
Marius Gabriel Suru ◽  
Nicoleta Monica Lohan ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Structural Changes ◽  
Thermomechanical Processing ◽  
Mechanical Analysis ◽  
Dynamic Responses ◽  
Surface Areas ◽  
Specimen Holder ◽  
Hot Rolled

Fe-14Mn-6Si-9Cr-5Ni (wt. %) shape memory alloys (SMAs) were produced by powder metallurgy (PM) combined with Mechanical Alloying (MA). The specimens were pressed and sintered under Ar atmosphere from as blended powders as well as from mixtures of as blended and 10, 20, 30 and 40 vol. % MA’ed powders, respectively. The five groups of sintered specimens were hot-rolled, spark-erosion cut and solution treated at five temperatures (923, 1023, …, 1373K/ 300 s/ water). Tensile loading-unloading tests were performed in order to obtain stress-induced martensite at different pre-straining degrees. The static responses of the twenty five types of specimens were evaluated by means of the surface areas under unloading curve (E2) and between loading and unloading curves (E1) which were used for determining static internal friction, Q-1. The dynamic responses of the undeformed specimens were determined by Dynamic Mechanical Analysis (DMA) performed at room temperature with a three-point-bending specimen holder in strain sweep mode. The structure of the twenty five specimens was analyzed X-ray diffraction. The effects of MA fraction were correlated with static and dynamic responses via structural changes.

scholarly journals Hierarchically structured, highly porous nickel synthesized in sintering–evaporation process from a metal nanopowder and a space holder

2019 ◽  
Vol 484 (4) ◽  
pp. 436-440
Author(s):  
A. G. Gnedovets ◽  
V. A. Zelenskii ◽  
A. B. Ankudinov ◽  
M. I. Alymov
Keyword(s):  
Powder Metallurgy ◽  
Porous Material ◽  
Ammonium Bicarbonate ◽  
Evaporation Process ◽  
Porous Nickel ◽  
Space Holder ◽  
Nickel Nanopowder ◽  
Powder Metallurgy Methods ◽  
Highly Porous ◽  
Highly Porous Material

This paper reports on the creation of a highly porous material with a hierarchical structure using powder metallurgy methods based on nickel nanopowder and ammonium bicarbonate NH4HCO3 as a space holder.

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