Obtaining of Composite Alloys Based on Nickel Aluminides with Rare Metals

2021 ◽  
Vol 887 ◽  
pp. 73-78
Author(s):  
Sergey N. Khimukhin ◽  
E.D. Kim ◽  
Ri Khosen
Keyword(s):  
High Temperature ◽  
Nickel Aluminide ◽  
Reduction Process ◽  
Intermetallic Alloys ◽  
Positive Experience ◽  
Tungsten Carbides ◽  
Rare Metals ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
A Charge

The paper presents the research results on the production of doped composite materials by the method of out-of-furnace liquid-phase self-propagating high-temperature synthesis using oxides and mineral concentrates containing Zr and W as a charge. The positive experience of producing ingots of intermetallic alloys based on the Ni-Al system in one stage of the reduction process of joint metallothermy is shown. The use of Zr in the charge leads to grinding of microstructure of the ingots and the formation of intermetallic compounds containing Zr. The additional use of C, B2O3, and W in the charge results in the formation of complex borides and tungsten carbides in the ingots. Additional introduction of Cr2O3 into the charge is necessary for the formation of W carbides in the nickel aluminide matrix.

Induction-activated self-propagating, high-temperature synthesis of nickel aluminide

2017 ◽  
Vol 28 (11) ◽  
pp. 2974-2979 ◽  
Author(s):  
M. Shekari ◽  
M. Adeli ◽  
A. Khobzi ◽  
M. Kobashi ◽  
N. Kanetake
Keyword(s):  
High Temperature ◽  
Nickel Aluminide ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

High temperature synthesis of nickel aluminide alloys with tungsten carbide

2020 ◽  
pp. 31-34
Author(s):  
S. N. Khimukhin ◽  
◽  
V. B. Deev ◽  
E. Kh. Ri ◽  
E. D. Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Tungsten Carbide ◽  
Nickel Aluminide ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Investigations of Tungsten Based Intermetallic Alloys by Self Propagating High Temperature Synthesis from Metal Oxide Precursors

2012 ◽  
Vol 488-489 ◽  
pp. 300-304
Author(s):  
Tawat Chanadee ◽  
Jessada Wannasin ◽  
Sutham Niyomwas
Keyword(s):  
High Temperature ◽  
Phase Distribution ◽  
Equilibrium Composition ◽  
Intermetallic Alloys ◽  
Reaction Products ◽  
Temperature Synthesis ◽  
Minimization Method ◽  
High Temperature Synthesis ◽  
Mixture System

The in-situself propagating high temperature synthesis technique were used to synthesis tungsten based intermetallic alloys from WO3/SiO2/Al and WO3/B2O3/Al reactant mixture system. The reaction was carries out in a SHS reactor under static argon gas at the pressure of 0.5 MPa. The standard Gibbs energy minimization method was used to calculate the equilibrium composition of the reacting species. The microstructure and phase distribution of the SHS reaction products were characterized by scanning electron microscopy (SEM) and energy dispersive x-ray (EDX), respectively. The results indicate that complete reaction of precursors to yield Al2O3-WSi2 and Al2O3-WB as product composites with clearly separation between Al2O3 and WB.

On the Physicochemical Mechanism of the Influence of Preliminary Mechanical Activation on Self-Propagating High-Temperature Synthesis

2008 ◽  
Vol 138 ◽  
pp. 159-164 ◽  
Author(s):  
Boris B. Khina ◽  
Boleslaw Formanek
Keyword(s):  
High Temperature ◽  
Mechanical Activation ◽  
Cold Work ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
State Diffusion ◽  
Physicochemical Mechanism ◽  
Charge Mixture ◽  
Phase Intermetallic ◽  
A Charge

The analysis of physicochemical mechanism of the influence of mechanical activation (MA) of a charge mixture on the subsequent self-propagating high-temperature synthesis (SHS) of intermetallic compounds is performed. Numerical estimates have revealed an insignificant role of the energy stored in solid reactants due to cold work during MA. The characteristic time of relaxation of non-equilibrium vacancies, which were generated in metals by MA, during heating in the SHS wave is estimated, and their insignificant influence on the reaction kinetics at high temperatures is demonstrated. It is shown that a strong effect of preliminary MA on SHS can be attributed only to deformation-enhanced solid-state diffusion during MA, which can lead to the formation of a supersaturated solid solution and thus affect the conditions for nucleation of a product phase (intermetallic compound) upon heating.

Fabrication of Dense Nickel Aluminide Monolithic and Composite Bodies By Combined Self Propagating High Temperature Synthesis and in Situ Containerless Hot Isostatic Pressing

1990 ◽  
Vol 213 ◽  
Author(s):  
Michael Concannon ◽  
Edwin S. Hodge ◽  
Andrew C. Nyce ◽  
Christopher P. Turmel
Keyword(s):  
High Temperature ◽  
Nickel Aluminide ◽  
Room Temperature ◽  
Hot Isostatic Pressing ◽  
Nickel Aluminum ◽  
Temperature Synthesis ◽  
Isostatic Pressing ◽  
High Temperature Synthesis ◽  
Cold Pressed

ABSTRACTMonolithic Ni 3Al and composite Ni3Al/ceramic whisker bodies were fabricated by combined Self Propagating High Temperature Synthesis and in situ containerless Hot Isostatic Pressing (SHS/HIP), starting from cold pressed blends of nickel, aluminum, and boron powders, with and without additions of alumina whiskers. The resultant bodies were dense and had good ductility and mechanical strength at room temperature.

Sign in / Sign up

Export Citation Format

Share Document