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Coating

About: Coating is a research topic. Over the lifetime, 379844 publications have been published within this topic receiving 3145488 citations. The topic is also known as: surface coating.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a columnar growth structure is defined by voided open boundaries, which is superimposed on a microstructure which may be polycrystalline (defined by metallurgical grain boundaries) or amorphous.
Abstract: Microstructure is a critical consideration when polycrystalline or amorphous thin films are used for applications such as microcircuit metallization layers and diffusion barriers. The trend in device fabrication toward lower processing temperatures means that such coatings must often be deposited at substrate temperatures T that are low relative to the coating material melting point Tm. The structure of vapor deposited coatings grown under these conditions consists typically of a columnar growth structure, defined by voided open boundaries, which is superimposed on a microstructure which may be polycrystalline (defined by metallurgical grain boundaries) or amorphous. The voided growth structure is clearly undesirable for most applications. Its occurrence is a fundamental consequence of atomic shadowing acting in concert with the low adatom mobilities that characterize low T/Tm deposition, and its formation can be enhanced by the surface irregularities which are common to microcircuit fabrication. This pap...

1,198 citations

Journal ArticleDOI
TL;DR: In this article, a review of the metallurgy of zinc-coated steel from a scientific standpoint to develop relationships to practical applications is presented. And the effect of the microstructures of these coatings on the important properties of corrosion, formability, weldability and paintability is discussed.

1,194 citations

Journal ArticleDOI
TL;DR: The technique of plasma spraying has been applied to deposit a thin, dense layer of hydroxylapatite onto a titanium substrate, and animal studies showed similar histological reactions to apatite coatings as to (well documented) Apatite bulk materials.
Abstract: The technique of plasma spraying has been applied to deposit a thin, dense layer of hydroxylapatite onto a titanium substrate. Bond strength of such apatite coatings with the substrate have been measured, as well as the (absence of) influence of the coating process on fatigue properties of the substrate. Animal studies showed similar histological reactions to apatite coatings as to (well documented) apatite bulk materials.

1,119 citations

Journal ArticleDOI
TL;DR: In this paper, the fundamental nature of the internal stresses that are found in both evaporated and sputtered coatings is reviewed from the point of view of decorative coating applications, which indicate that apparatus geometry is particularly important in determining the state of stress that forms in deposits.

1,096 citations

Journal ArticleDOI
TL;DR: In this paper, BaZrO3 and La2Zr2O7 powders were optimized for application as powders for plasma spraying and thermal properties of these materials were determined.
Abstract: Zirconates with high melting points were investigated for application as materials for thermal barrier coatings at operating temperatures >1300°C. SrZrO3, BaZrO3, and La2Zr2O7 powders were synthesized and sintered to compacts with various levels of porosity. The sintering results indicated a promising low-sintering activity of the investigated materials. Thermal properties of these dense materials were determined. Thermal expansion coefficients were slightly lower than those of Y2O3-stabilized ZrO2 (YSZ); thermal conductivities of SrZrO3 and BaZrO3 were comparable or slightly higher than those of YSZ. La2Zr2O7 had a lower thermal conductivity. SrZrO3 was not suitable for application as a thermal barrier coating because of a phase transition at temperatures between 700° and 800°C. Mechanical properties (hardness, fracture toughness, and Young’s modulus) of dense BaZrO3 and La2Zr2O7 samples were determined by indentation techniques and showed lower hardness and Young’s modulus compared to YSZ. BaZrO3 and La2Zr2O7 powders were optimized for application as powders for plasma spraying. Plasma-sprayed coatings were produced and characterized. Thermal cycling with a gas burner at 1200°C showed a massive attack of the BaZrO3 coating, with loss of BaO. On the other hand, the La2Zr2O7 coating showed excellent thermal stability and thermalshock behavior.

1,074 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237,393
202214,576
20218,265
202016,150
201920,319
201820,708