TiC coatings on an alloyed steel produced by thermal diffusion

2020 ◽  
Vol 62 (9) ◽  
pp. 909-912
Author(s):  
Musa Kilic
Keyword(s):  
Titanium Carbide ◽  
Thermal Diffusion ◽  
Coating Thickness ◽  
Protective Layer ◽  
Optical Microscope ◽  
Element Distribution ◽  
Alloyed Steel ◽  
Carbide Powder ◽  
Different Temperatures ◽  
Thermal Coating

Abstract In this study, an alloyed steel surface was coated by thermal diffusion with titanium carbide powder at different temperatures (900, 1000 and 1100 °C) and times (1, 2 and 3 h) to determine their effect on the coating microstructure. The thermal coating was carried out by tube cementation designed and manufactured by us for the purpose of thermal coating. Coating thickness, element distribution and phase composition were analyzed by optical microscope, scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction (XRD) methods, respectively. Microhardness tests were performed to determine mechanical properties. The influence of different temperatures and production times on the coating thickness and microstructure were determined. The results illustrated that titanium carbide particles adhere almost completely and are diffused to the substrate during production. Thus, coating thickness increased through increasing time and temperatures. Moreover, microhardness increased with increasing temperature more than time did. The highest microhardness value achieved was 1301 HV for 3 hours. Temperatures of 1000 °C were reached due to the diffusion of TiC to the surface of the substrate, thus forming an extremely hard and protective layer.

Coating thickness determination in highly absorbent core–shell systems

2012 ◽  
Vol 45 (5) ◽  
pp. 906-913 ◽  
Author(s):  
Herve Palancher ◽  
Anne Bonnin ◽  
Veijo Honkimäki ◽  
Heikki Suhonen ◽  
Peter Cloetens ◽  
...  
Keyword(s):  
Coating Thickness ◽  
Protective Layer ◽  
Test Sample ◽  
High Energy ◽  
Core Shell ◽  
Single Shot ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alloy Particles ◽  
Potential Applications

This article describes a single-shot methodology to derive an average coating thickness in multi-particle core–shell systems exhibiting high X-ray absorption. Powder composed of U–Mo alloy particles surrounded by a micrometre-thick UO2protective layer has been used as a test sample. Combining high-energy X-ray diffraction and laser granulometry, the average shell thickness could be accurately characterized. These results have been validated by additional measurements on single particles by two techniques: X-ray nanotomography and high-energy X-ray diffraction. The presented single-shot approach gives rise to many potential applications on core–shell systems and in particular on as-fabricated heterogeneous nuclear fuels.

Fabrication and Properties of Cu-Cr Coatings on the Inner Wall of Steel Pipe by Mechanical Alloying Method

2012 ◽  
Vol 602-604 ◽  
pp. 1663-1666
Author(s):  
Zhong Qing Tian ◽  
Guo Xing Zhang ◽  
Wei Jiu Huang ◽  
Yu Kai Zhu
Keyword(s):  
Friction Coefficient ◽  
Mechanical Alloying ◽  
Coating Thickness ◽  
High Speed ◽  
Testing Machine ◽  
Optical Microscope ◽  
Steel Pipe ◽  
Rotating Speed ◽  
Friction Testing ◽  
Cr Coating

The mechanical alloying method process has been innovatively used to prepare Cu-Cr coating on the inner wall of steel pipe. The effect of the rotating speed on thickness, microhardness and friction coefficient of the Cu-Cr coating was investigated. The coating thickness was measured from all samples using optical microscope. The microhardness was analyzed by Digital Microhardness Tester. The friction coefficient was tested by high speed reciprocating friction testing machine. The results show that the coating thickness is 26, 29 and 31μm at the rotating speed of 200, 250 and 300 rpm. The microhardness of the Cu-Cr coating prepared at 200, 250 and 300 rpm are about 760, 780 and 830 Hv. The friction coefficient of the Cu-Cr coating prepared at 200 rpm are about 0.25, 0.40 and 0.38 at the frequencies of 3, 4 and 5 Hz. The friction coefficient of the Cu-Cr coating prepared at 250 rpm are about 0.30, 0.29 and 0.20 at the frequencies of 3, 4 and 5 Hz. The friction coefficient of the Cu-Cr coating prepared at 300 rpm are about 0.10, 0.13 and 0.09 at the frequencies of 3, 4 and 5 Hz.

FeNi-TiC Composite Powders Obtained by Electrolytic Co-Deposition

2011 ◽  
Vol 672 ◽  
pp. 133-136
Author(s):  
Nicolaie Jumate ◽  
Ioan Vida-Simiti ◽  
Dorel Nemeş ◽  
György Thalmaier ◽  
Niculina Sechel ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Nickel Alloy ◽  
Composite Powder ◽  
Carbide Powder ◽  
Metallic Ions ◽  
Composite Powders ◽  
The Matrix ◽  
Iron Nickel ◽  
Powder Particles ◽  
Carbide Particles

The paper presents a preliminary study on the obtaining of a composite powder by an electrolytic method. The composite powder particles are composed of iron nickel alloy that represents the matrix of the composite, and titanium carbide as the reinforcement. The matrix was obtained by electrolytic co-deposition from pure iron and nickel, in form of consumable electrodes. The titanium carbide powder is in suspension in the electrolyte. By the migration of metallic ions towards the cathode, the iron- nickel alloy is formed and, by simultaneously driving the carbide particles found in the electrolyte onto the cathode, the composite powder is obtained. The resulted composite powders were characterized by optical and electron microscopy. The influence of obtaining conditions over the morphology and structure of composite powders is emphased.

Creep in the hot pressing of titanium carbide powder

1973 ◽  
Vol 12 (1) ◽  
pp. 23-31
Author(s):  
M. S. Koval'chenko ◽  
L. F. Ochkas
Keyword(s):  
Titanium Carbide ◽  
Hot Pressing ◽  
Carbide Powder

Anatase Type Titanium Dioxide Prepared by Oxidation of Titanium Carbide

2016 ◽  
Vol 860 ◽  
pp. 92-96
Author(s):  
Junichi Matsushita ◽  
Tomoyuki Tsuchiyama ◽  
Kazuya Hamaguchi ◽  
Naoya Iwamoto ◽  
Xiao Ling Wang ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
High Temperature ◽  
Titanium Carbide ◽  
Radiant Energy ◽  
High Hardness ◽  
Mass Gain ◽  
Carbide Powder ◽  
Temperature Oxidation ◽  
Air Atmosphere ◽  
Powder Samples

Titanium carbide has been attractive for years an engineering ceramics due to its high hardness, high melting point, and good chemical stability. Similarly, titanium dioxide has excellent anti-microbial ceramic material by photon energy. In this study, the anatase type titanium dioxide layer prepared by oxidation of the titanium carbide powder by high temperature oxidation in air atmosphere was investigated in order to determine the possibility of its photocatalyst materials by radiant energy. TiC powder samples of different grain size were gained by ball mill. These samples were oxidized at room temperature to high temperature. The samples exhibited a steady mass gain with increasing oxidation temperature. Based on the results of the X-ray diffraction analysis, anatase type TiO2 was detected on the titanium carbide samples. It is considered, the titanium carbide showed convension anatase type titanium dioxide layer produced by oxidation.

Mechanical Properties and Fracture Study of Alumina Dispersion Hardened Copper-Based Nano-Composite at Elevated Temperatures

2013 ◽  
Vol 829 ◽  
pp. 583-588 ◽  
Author(s):  
Ali Dalirbod ◽  
Yahya A. Sorkhe ◽  
Hossein Aghajani
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Fracture Surface ◽  
Yield Strength ◽  
Elevated Temperatures ◽  
Tensile Tests ◽  
Testing Temperature ◽  
Optical Microscope ◽  
Tensile Fracture ◽  
Different Temperatures

Alumina dispersion hardened copper-base composite was fabricated by internal oxidation method. The high temperature tensile fracture of Cu-Al2O3 composite was studied and tensile strengths were determined at different temperatures of 600, 680 and 780 °C. Microstructure was investigated by means of optical microscope and field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy (EDS). Results show that, ultimate tensile strength and yield strength of copper alumina nanocomposite decrease slowly with increasing temperature. The yield strength reaches 119 MPa and ultimate tensile strength reaches 132 MPa at 780 °C. Surface fractography shows a dimple-type fracture on the fracture surface of the tensile tests where dimple size increases with increasing testing temperature and in some regions brittle fracture characteristics could be observed in the fracture surface.

The Structure and Wear Resistance of the Surface Layers Obtained by the Atmospheric Electron Beam Cladding of TiC on Titanium Substrates

2014 ◽  
Vol 682 ◽  
pp. 14-20 ◽  
Author(s):  
Olga G. Lenivtseva ◽  
Daria V. Lazurenko ◽  
Vitaliy V. Samoylenko
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Titanium Carbide ◽  
Volume Fraction ◽  
High Strength ◽  
Carbide Powder ◽  
Surface Layers ◽  
Matrix Morphology ◽  
Titanium Substrates ◽  
Carbide Particles

In this study the structure and properties of surface layers obtained on cp-titanium workpieces by non-vacuum electron beam cladding of titanium carbide powder were investigated. The structure of modified materials was examined by optical microscopy and scanning electron microscopy. It was shown that the cladded layer had a high quality and thickness of about 2.3 mm. The cladded layer microstructure consisted of high-strength titanium carbide crystals distributed in titanium matrix. Morphology of titanium carbide particles and their volume fraction changed in the direction from the surface layer to the heat affected zone. The average microhardness value of the cladded layer was ~500 HV. Surface alloyed layers were of higher wear resistance compared to cp-titanium.

Effect of High-Pressure Solution Temperature on Microstructure and Mechanical Properties of AZ61 Magnesium Alloy

2012 ◽  
Vol 580 ◽  
pp. 505-508 ◽  
Author(s):  
Yu Shan Li
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Magnesium Alloy ◽  
Atmospheric Temperature ◽  
Optical Microscope ◽  
Solution Temperature ◽  
Hardness Tester ◽  
Az61 Magnesium Alloy ◽  
Mg17al12 Phase ◽  
Different Temperatures

As-cast AZ61 magnesium alloy was treated by solution under a high-pressure of 3 Gpa at different temperatures, atmospheric temperature, 200, 400, 600, 800 and 1000 °C. The microstructure of the products was observed by optical microscope. The mechanical properties of the products were investigated by brinell hardness tester and tensile testing. The results show that increasing solution temperature promotes the dissolution into α-Mg matrix of β-Mg17Al12 phase of AZ61 alloy, especially for over 400 °C. With increasing solution temperature, the tensile strength and elongation percentage of AZ61 increase gradually, but the hardness decreases.

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