scholarly journals The effect of powder mixtures composition on the structure and properties of carbide diffusion layers

2016 ◽  
pp. 80-86
Author(s):  
Butukhanov Vyacheslav ◽  
◽  
Lygdenov Bur'yal ◽  
Keyword(s):  
Structure And Properties ◽  
Powder Mixtures ◽  
Diffusion Layers

Structure and properties of ZnSxSe1−xthin films deposited by thermal evaporation of ZnS and ZnSe powder mixtures

2015 ◽  
Vol 2 (2) ◽  
pp. 025006 ◽  
Author(s):  
R G Valeev ◽  
E A Romanov ◽  
V L Vorobiev ◽  
V V Mukhgalin ◽  
V V Kriventsov ◽  
...  
Keyword(s):  
Thermal Evaporation ◽  
Structure And Properties ◽  
Powder Mixtures

The effect of stadial nitrogenization on the structure and properties of martensitic steel 13X11N2V2MF

2021 ◽  
Vol 2021 (12) ◽  
pp. 12-19
Author(s):  
Mikhail Prokofev ◽  
Larisa Petrova ◽  
Irina Belashova ◽  
Petr Bibikov
Keyword(s):  
Wear Resistance ◽  
Martensitic Steel ◽  
New Method ◽  
Structure And Properties ◽  
High Quality ◽  
Corrosion Stability ◽  
Test Mode ◽  
Gas Nitriding ◽  
Diffusion Layers

A new method of gas nitriding is presented, which produces obtaining high-quality diffusion layers that meet the requirements of the use for various purposes, including aviation ones. Peculiar properties of highly alloyed martensitic steel nitriding after stadial thermo-gas-cyclic nitrogenization under partially dissociated ammonia with air additives have been examined. The results of metallographic studies, diagnostic leach, tests for wear resistance, impact hardness and corrosion stability, depending on the test mode are presented.

Structure and properties of titanium surface layers after electron beam alloying with powder mixtures containing carbon

2015 ◽  
Vol 355 ◽  
pp. 320-326 ◽  
Author(s):  
O.G. Lenivtseva ◽  
I.A. Bataev ◽  
M.G. Golkovskii ◽  
A.A. Bataev ◽  
V.V. Samoilenko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Titanium Surface ◽  
Structure And Properties ◽  
Surface Layers ◽  
Powder Mixtures

Structure and Properties of Nickel Aluminide Layers on INCONEL 100

2010 ◽  
Vol 636-637 ◽  
pp. 1011-1018 ◽  
Author(s):  
R. Sitek ◽  
H. Matysiak ◽  
Julia Ferenc-Dominik ◽  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Nickel Aluminide ◽  
Chemical Vapour ◽  
Microstructural Characterization ◽  
Hydrogen Atmosphere ◽  
Aluminium Chloride ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Diffusion Layers ◽  
Scratch Tests

The paper presents the results of investigations into the structure and properties of Ni-Al diffusion layers produced on INCONEL 100 by Chemical Vapour Deposition (CVD). The process was carried out in aluminium chloride (AlCl3) mixed with hydrogen atmosphere. The as-deposited layers were subjected to thermal treatment in vacuum to optimize their adhesion, hardness and temperature-resistance. Microstructural characterization of the coatings was carried out by scanning electron microscopy (SEM) The chemical composition was measured via EDS and the phase content was investigated by X-ray diffraction XRD. The resistance to high temperature of the coatings at atmospheric pressure was tested by applying 24-hours cycles at 950 °C. Scratch-tests provided data on the microhardness and adhesion of the coatings. The results indicate that the layers produced on the INCONEL 100 exhibit a very good adhesion combined with exceptional corrosion resistance at high temperatures.

Structure and properties of diffusion layers after chromizing using chromium oxide

1985 ◽  
Vol 27 (1) ◽  
pp. 8-10
Author(s):  
V. I. Evtukhov ◽  
P. T. Goryachev ◽  
S. Ya. Panfilova
Keyword(s):  
Chromium Oxide ◽  
Structure And Properties ◽  
Diffusion Layers

Diffusion Layers with Ti and Ti+Al Formed on 316L Austenitic Steel by a Pack Cementation Procedure

2011 ◽  
Vol 312-315 ◽  
pp. 13-19 ◽  
Author(s):  
Iulia Mirela Britchi ◽  
Mircea Olteanu ◽  
Niculae Ene ◽  
Petru Nita
Keyword(s):  
Activation Energy ◽  
Powder Mixture ◽  
Pack Cementation ◽  
X Ray Diffraction ◽  
Powder Mixtures ◽  
X Ray ◽  
Diffusion Coatings ◽  
Diffusion Layers ◽  
316L Steel ◽  
Temperature Activation

Pack cementation procedure implies the use of a powder mixture containing the diffusive elements, which in our case are either Ti or Ti+Al, Al2O3 and NHCl as activator. In the case of titanizing the powder mixture contained 77% in weight Ti, while for alumino-titanizing Al/Ti = 1/5 ratio was employed. NH4Cl content was 3% in weight in all cases. Aluminium additions to the powder mixtures led to a decrease of the process temperature. Activation energy for the aluminizing of austenitic 316L steel is 73.87 KJ/mol, much smaller than for the titanizing, 257.86 KJ/mol. Activation energy for alumino-titanizing, in the same conditions, is 146.01 KJ/mol. All diffusion coatings, in the Ti – 316L and Ti+Al – 316L couples are formed of two layers having different structures and compositions. All couples were investigated by optical microscopy, electron microscopy (SEM and EDX), X-ray diffraction and microhardness trials.

scholarly journals STRUCTURE AND PROPERTIES OF BORID AND CARBORBORIDE COATINGS FORMED IN MELTS OF BORON AND CARBON SALTS

2020 ◽  
pp. 80-86
Author(s):  
V. Teldekov ◽  
L. Gurevich
Keyword(s):  
Corrosion Resistance ◽  
Heat Resistance ◽  
Structure And Properties ◽  
Comparative Tests ◽  
Diffusion Coatings ◽  
Diffusion Layers ◽  
Melt Composition ◽  
Hcl Solution

Qualitative diffusion layers were obtained by boroning steels 40Cr, 20CrNi3, 25CrMnTi at 950 ° C for 3 to 5 hours in a melt based on borax. The melt composition is determined for the simultaneous diffusion of boron and carbon into steel. Comparative tests of heat resistance and corrosion resistance of the obtained diffusion coatings are carried out. Diffusion layers based on iron borides had the best corrosion resistance during long-term tests in a 10 % HCl solution. Corrosion resistance of hardened cemented steel 25CrMnTi is 5-10 times lower than that of boride layers.

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