Simulation of the effects of different substrates, temperature, and substrate roughness on the mechanical properties of Al2O3 coating as tritium penetration barrier

2019 ◽  
Vol 30 (4) ◽  
Author(s):  
Ze Liu ◽  
Fei Meng ◽  
Liang-Bi Yi
Keyword(s):  
Mechanical Properties ◽  
Al2o3 Coating ◽  
Substrate Roughness

Development of Nanostructured Al2O3-Ni HVOF Coatings

2006 ◽  
Vol 317-318 ◽  
pp. 539-544 ◽  
Author(s):  
Simo Pekka Hannula ◽  
Erja Turunen ◽  
Jari Keskinen ◽  
Tommi Varis ◽  
Teppo Fält ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Spraying ◽  
Al2o3 Coating ◽  
Hvof Spraying ◽  
Protective Properties ◽  
Hvof Coatings ◽  
Hvof Thermal Spraying ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

HVOF thermal spraying has been developed to deposit dense Al2O3-coatings for improved protective properties. As compared to generally used plasma sprayed coatings HVOF coatings can be prepared much denser and thus are better suited for applications where protective properties of the coating are needed. In this paper we describe the development of HVOF spraying technologies for nanocrystalline Al2O3- and Al2O3-Ni-coatings. The microstructure and the mechanical properties of these novel coatings are reported and compared to a conventionally processed Al2O3-coating.

scholarly journals Mechanical characterization of copper coatings electrodeposited onto different substrates with and without ultrasound assistance

2019 ◽  
Vol 84 (7) ◽  
pp. 729-741 ◽  
Author(s):  
Ivana Mladenovic ◽  
Jelena Lamovec ◽  
Vesna Jovic ◽  
Marko Obradov ◽  
Dana Vasiljevic-Radovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Major Influence ◽  
Test Model ◽  
Substrate Roughness ◽  
Adhesion Properties ◽  
Ni Substrate ◽  
Coating Roughness ◽  
Copper Coatings ◽  
Ultrasound Application ◽  
Electrodeposited Nickel

The mechanical properties of systems consisting of copper coatings electrodeposited on both brass sheet (BS) and thick electrodeposited nickel coating (ED Ni) substrates have been investigated. The electrodeposition of copper coatings was performed with and without the ultrasound assistance. The ultrasound application decreases root mean square (RMS) roughness of deposited Cu coating on both applied substrates, as obtained from non-contact AFM measurement. The coating roughness is highly dependent on the substrate roughness, being the smallest for the Cu coatings deposited on ED Ni substrate with the ultrasound mixing. The hardness and adhesion properties were characterized using the Vickers microindentation test. Model of Korsunsky was applied to the experimental data for determination the film hardness and the model of Chen-Gao was used for the adhesion evaluation. The introduction of ultrasonic agitation caused the changes in the film microstructure, and consequently in the mechanical properties. The copper coatings on both substrates, have higher hardness when deposited from electrolyte with ultrasound agitation. Although the type of the substrate has the major influence on the adhesion strength, it can be said that Cu electrodeposition with ultrasonic mixing contributes to an increase in adhesion.

Corrosion Behaviors and Mechanical Properties of CrN Film

2013 ◽  
Vol 853 ◽  
pp. 155-163
Author(s):  
Pornwasa Wongpanya ◽  
Sarayut Tunmee ◽  
Chanan Euaruksakul ◽  
Prayoon Songsiriritthigul ◽  
Nirun Witit-Anun
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Electron Spectroscopy ◽  
Electrochemical Technique ◽  
Nacl Solution ◽  
Substrate Roughness ◽  
H13 Steel ◽  
X Ray ◽  
Corrosion Behaviors ◽  
Photoemission Electron

Corrosion behaviors and mechanical properties of CrN film were evaluated. The CrN film was deposited on the surface of H13 steel by the magnetron sputtering method. The corrosion behaviors of the uncoated and CrN coated samples were studied in air-saturated 3.5 wt.% NaCl solution with various solution pHs, i.e., pH 2, 7 and 10 at 27°C by the electrochemical technique. The mechanical properties of the CrN coated samples were evaluated using nanohardness, ball on disk and scratch testers. The results revealed that the CrN coated samples had higher corrosion resistance than the uncoated samples at all pHs. Smooth substrate roughness enhanced corrosion resistance and also decreased the wear rate of the CrN coated samples on H13 steel. Corroded area was evaluated by synchrotron X-ray photoemission electron spectroscopy. It revealed that corrosion resistance of the CrN film was from oxidation of Cr into Cr2O3.

Effect of Surface Substrate Roughness and of Chelating Agent on the Microstructure and Mechanical Properties of Electroless Processed Brass Coatings

2010 ◽  
Vol 49 (14) ◽  
pp. 6388-6393
Author(s):  
Abel Hurtado-Macias ◽  
Carlos Domínguez-Ríos ◽  
Juan Muñoz-Saldaña ◽  
Roal Torres-Sánchez ◽  
Sergio A. Pérez-García ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chelating Agent ◽  
Substrate Roughness ◽  
Microstructure And Mechanical Properties ◽  
Effect Of Surface

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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