Wear resistance of boron-chromium and boron-silicon diffusion coatings

1977 ◽  
Vol 19 (6) ◽  
pp. 458-460
Author(s):  
I. N. Kidin ◽  
V. A. Volkov ◽  
A. A. Aliev ◽  
I. K. Bikbulatov ◽  
S. N. Smirnov
Keyword(s):  
Wear Resistance ◽  
Diffusion Coatings ◽  
Silicon Diffusion

scholarly journals Analysis of Wear Resistance of Borided Steel C45

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5529
Author(s):  
Mykhaylo Pashechko ◽  
Krzysztof Dziedzic ◽  
Jerzy Jozwik
Keyword(s):  
Wear Resistance ◽  
Wear Surface ◽  
Chemical Elements ◽  
Substrate Material ◽  
High Wear Resistance ◽  
Material Research ◽  
Specific Pressure ◽  
Diffusion Coatings ◽  
Boride Coatings ◽  
Induced Structure

The wear resistance of diffusion coatings in conditions of specific pressures of 3, 7 and 10 MPa was studied. The boride coatings were prepared by means of diffusion methods using C45 steel as the substrate material. Research on the microstructure and redistribution of chemical elements on wear surface of a borided layer was carried out. It was found that the boride coatings should be used under a specific pressure of 7 MPa. It was found that the wear of friction couple coating of steel C45 under specific pressure of 3 MPa proceeds according to the oxidation wear mechanism, while under specific pressures of 7 and 10 MPa the abrasive wear prevails. The wear-induced segregation of atoms in coatings was studied using secondary mass-spectroscopy method (SIMS). Increased C, O, and B concentrations were noticed at the wear surface on depth from 50 to 2000 Å. The secondary wear-induced structure formation on the wear surface resulted in high wear resistance of diffusion borided coatings.

Wear resistance of titanium diffusion coatings on cast iron

1978 ◽  
Vol 20 (3) ◽  
pp. 246-248
Author(s):  
N. P. Baidak ◽  
G. N. Koval'chuk ◽  
V. P. Shapovalov ◽  
N. S. Gorbunov
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Diffusion Coatings ◽  
Titanium Diffusion

scholarly journals ESTIMATION OF WEAR RESISTANCE OF INTERMETALLIC COATINGS BASED ON COPPER ALUMINIDES

2020 ◽  
pp. 14-17
Author(s):  
V. G. Shmorgun ◽  
O. V. Slautin ◽  
V. P. Kulevich ◽  
A. A. Artem’ev ◽  
O. M. Chukova
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Liquid Phase ◽  
Abrasive Wear ◽  
Explosion Welding ◽  
Subsequent Heat Treatment ◽  
Phase Interaction ◽  
Diffusion Coatings ◽  
Intermetallic Coatings ◽  
Tribotechnical Characteristics

The wear resistance of the Al-Cu system diffusion coatings, obtained using explosion welding and subsequent heat treatment in modes providing solid and liquid-phase interaction, was investigated, and their tribotechnical characteristics were assessed during scratching and under conditions of abrasive wear.

scholarly journals SURFACE HARDENING OF CONSTRUCTION MATERIALS WITH THE USE OF COMPOSITE SATURATING CHARGES

2020 ◽  
pp. 114-120
Author(s):  
Середа Б.П. ◽  
Кругляк І.В.
Keyword(s):  
Wear Resistance ◽  
Gas Phase ◽  
Sliding Friction ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Structural Materials ◽  
Gaseous Products ◽  
Diffusion Coatings ◽  
Diffusion Layers ◽  
The Relationship

The article discusses the formation of the structure of protective diffusion layers using composite saturating charges on structural materials with different carbon content. A thermodynamic analysis of the gas phase at saturation has been carried out. The composition of the gas phase has been determined. Gaseous products interact with elements of the powder system (Al, Mo, Cr) and are transformed into the gas phase (CrH, CrOH, CrСl, CrСl2, CrСl3, СrОН, СrОСl2, CrI, CrI2, CrI3, МоСl, МоСl2, МоСl3, МоСl4, МоОСl, МоОСl2, МоI, МоI2, МоI3, МоI4). Using 3D modeling of microstructures, it was possible to more fully establish the nature of the distribution of phases and inclusions in the diffusion layer. The relationship between the 3D microstructure of the material and its physical and mechanical properties made it possible to carry out modeling to obtain the optimal composition of the developed composite charge for saturation. Diffuse layers are formed on the surface of structural materials, which contain Mo2C and α phases - the Cr, Al, Mo phase, the inclusion of Fе7Мо6, (Fe, Сr, Al, Mo)23С6. Carbides of three types were found: hexagonal chromium carbide Сr7C3 and carbides Мо2С, Cr23C, Fe3Mo3C и Fe2Mo2C. The physical, mechanical and operational properties of structural materials with protective diffusion coatings have been investigated. At tests in the conditions of sliding friction the best wear resistance among the considered diffusion coverings has vanadium, titanium and borized. Their wear resistance is 1.8 - 2.3 times greater than that of coatings obtained under isothermal conditions.

High temperature stability of aluminide-coated Inconel 617

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540007
Author(s):  
Hyun Cho ◽  
Byeong Woo Lee
Keyword(s):  
Thermal Stability ◽  
Wear Resistance ◽  
Barrier Layer ◽  
Temperature Stability ◽  
Surface Region ◽  
High Temperature Stability ◽  
Helium Atmosphere ◽  
Inconel Alloy ◽  
Diffusion Coatings ◽  
Inconel 617

Aluminum diffusion coatings were applied to the Inconel 617 by a pack cementation. The effect of coatings on the thermal stability and wear resistance of the Inconel alloy after heat-treatment under an air and a helium atmosphere at 1000°C, 48 h has been studied. The aluminide-coated Inconel specimens are prepared at 850°C and 1000°C for 1 h. An aluminiding layer indexed as AlxNi1-x(x = 0.4–0.6) was formed near the surface region and it played a role as a barrier layer against the surface diffusion of Cr . The thin Cr2O3film formed in situ on the alloy surface is protective inhibiting further oxidation at moderate temperatures. As the temperature increases further, the thermal stability of the Inconel alloy is limited by the instability of the Cr2O3scale. The aluminide-coated Inconel 617 samples showed the better performances, the enhanced thermal stability and improved wear resistance, most likely due to the barrier layer formation with the reduced amount of Cr2O3scale formation.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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