Synthesis of Cast Composite Materials by SHS Metallurgy Methods

Yukhvid, V. I.; Андреев, Д. Е.; Санин, В. Н.; Горшков, В. А.; Алымов, М. И.

doi:10.4028/www.scientific.net/kem.746.219

Cited by 8 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At this temperature, the target product (metal melt) and the slag phase (metal oxide reducing agent) exist in the liquid phase and there is a gravitational separation (delayering) of the liquid metal and slag melts under the force of gravity. The ingots of cast high-melting compounds [12,17], solid alloys, oxide and composition materials [18,19], and also their weldings [20] are formed after cooling depending on the composition of the mixture and the conditions of synthesis.…”

Section: New Methods Of Treatment and Production Of Materials With Required Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Investigation of the Structure, Phase Composition, and Mechanical Properties of Ni-Based High-Temperature Alloys Manufactured by Different Methods

Tokmacheva-Kolobova

Манохин

Санин

et al. 2020

Inorg. Mater. Appl. Res.

View full text Add to dashboard Cite

A comprehensive comparative study of the structure, phase composition, and mechanical properties of heat-resistant nickel-based Ni-Cr-(X) alloys produced by the methods of traditional metallurgy and self-propagating high-temperature synthesis (SHS metallurgy) is carried out. With the purpose of formation of the submicrocrystalline structure, a longitudinal rolling and post-deformation annealing of the cast alloy is performed. The microstructure of the heat-resistant alloys is investigated by the SEM and TEM methods. It is shown that the cast alloy has a recrystallized structure with the mean grain size of ~1 μm and the particles of chromium carbides have a size of ~1-3 μm. After rolling and subsequent annealing (750°C/1 h), the average grain size is reduced to 0.43 μm and the formation of dispersed particles of carbides 100 nm in size is observed. The structure of the alloy obtained by SHS metallurgy is dendritic, and particles of W and Cr are absent. When 0.1 wt % carbon powder is added to the initial powder mixture for SHS synthesis, formation of the network of W and Cr particles is observed along the boundaries of dendrite colonies. It is found that the SHS Ni-based heat-resistant alloy similar in composition to commercial cast alloy is characterized by improved mechanical properties and increased heat resistance compared to the cast alloy in both the coarsegrained and the submicrocrystalline state. Adding the carbon powder to the powder mixture for SHS leads to a further increase in the resistance to high-temperature deformation owing to formation of the carbide phase impeding the movement of dislocations and grain boundary creeping processes.

show abstract

Section: New Methods Of Treatment and Production Of Materials With Required Propertiesmentioning

confidence: 99%

“…Employment of two molds eliminated spreading of the melt upon rotation of the rotor of the centrifugal SHS unit. The diagram of SH synthesis of the cast materials and its main stages are described in detail in [16][17][18][19].…”

Section: Methodsmentioning

confidence: 99%

Comparative Investigation of the Structure, Phase Composition, and Mechanical Properties of Ni-Based High-Temperature Alloys Manufactured by Different Methods

Tokmacheva-Kolobova

Манохин

Санин

et al. 2020

Inorg. Mater. Appl. Res.

View full text Add to dashboard Cite

show abstract

“…One of the promising methods for producing composite alloys is self-propagating hightemperature synthesis (SHS) [11][12][13][14][15][16][17][18][19][20]. The use of this technology to solve the set tasks is of interest both from the side of science and from the side of production.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Composite Alloy Based on Ore Concentrate and Oxide Compounds

Kim

Ermakov

et al. 2021

MSF

View full text Add to dashboard Cite

The conditions for the synthesis of Al-Cr-W alloys during the aluminothermic reduction of a mineral tungsten concentrate - scheelite were considered. The alloys were identified as an aluminum matrix by the methods of elemental and X-ray phase analyzes. It is shown that the alloy synthesized from scheelite concentrate contains small amounts of iron and oxygen impurities (1.2 wt. %). It has been established that the alloys have a composite structure: inclusions of continuously solid solutions based on chromium and tungsten, as well as chromium aluminides Al3(Cr, W, Fe)2, which have increased microhardness values (12.9 GPa) are distributed in the aluminum matrix.

show abstract

“…Co-based composites used in gas-turbine blades [1] are industrially produced by induction melting in MW smelting furnace. Recently, a similar material (analog of serial KhTN-61 alloy) was prepared via metallothermic SHS route [2]. This work aimed at exploring the possibility for tailoring the structure/composition of SHS-produced alloys upon addition of alloying agents.…”

mentioning

confidence: 99%

“…Commercial powders of Co 3 O 4 , Cr 2 O 3 , Nb 2 O 5 , WO 3 , MoO 3 , Al, and carbon black were used as start-ing materials. Combustion synthesis was performed a centrifugal machine at a = 200 g as described in detail elsewhere [2] using green mixes 1 and 2 (all figures in wt %): In all cases, the weight of green sample was 140 g. Target products were characterized by SEM/EDS (Zeiss Ultra 55 microscope), XRD (ARL X'TRA diffractometer), and chemical analysis.…”

mentioning

confidence: 99%