An approach to improve the lifetime of air plasma sprayed (APS) thermal barrier coatings (TBCs) by modifying the interfacial microstructure has been reported. The laser powder deposition technique was employed to fabricate the mesh structure (with the same composition as the bond coat) at the ceramic–substrate interface. After thermal cycling test, the APS TBCs with the mesh exhibited a much le...

Previous studies to compare the influence of surface characteristics of dental implants on cell behavior have used model systems to simulate the implant surface. In this study, bone cell interactions with smooth titanium, titanium dioxide-blasted, titanium plasma-sprayed, and hydroxyapatite plasma-sprayed implants, as manufactured for clinical use, were compared. Implants were exposed to neonat...

Fibre concentrations of asbestos were measured in the air of a communal dining room in which the damaged ceiling had a sprayed on coating of insulation containing asbestos. The average concentration of crocidolite asbestos fibres was 4 f/cm3, 20 times the highest air concentration that appears to have been reported previously for a public building. It is concluded that although air concentratio...

The objective of this study was to mimic the microstructure of MCrAlY coatings sprayed using HVOF (High Velocity Oxy-Fuel) processes by using an Air Plasma Spray (APS) process in order to improve oxidation and spallation life of MCrAlY APS coatings. Figure 1 shows the typical microstructures obtained when spraying bond coats using the (a) HVOF process, and (b) the APS process. The microstructur...

The elastic properties of the individual layers of layered materials can be derived from the resonant frequencies of a set of test specimens comprising samples with different layer configurations [1]. Based on this, a mixed numerical-experimental framework for the identification of the elastic properties of layered materials has been formulated and a number of different identification routines ...

Al2O3 ceramic reinforced with 4-wt% multiwalled carbon nanotube (CNT) is plasma sprayed for improving the fracture toughness of the nanocomposite coating. Two different methodologies of CNT addition have been adopted in the powder feedstock to assist CNT dispersion in the nano-Al2O3 matrix. First, spray-dried nano-Al2O3 agglomerates are blended with 4 wt% CNT as powder-feedstock, which is subse...

2014 An original method for the statistical analysis of the temperature of solid particles in a plasma stream is presented. The apparatus and calibration method are described. Temperature distributions of Al2O3 particles sprayed in an argon-hydrogen plasma were investigated. REVUE DE PHYSIQUE APPLIQUÉE TOME 12, SEPTEMBRE 1977, Classification Physics Abstracts 52.70

Research was carried out concerning spraying young cherry trees with a multirotor drone: hexacopter. The aim of the study to evaluate impact following: nozzle type, air stream from drone rotors and size spacing between on distribution liquid sprayed in crown being sprayed. Experimental trials were conducted laboratory test stand. Air-injector spray nozzles: single twin flat used interchangeably...

Thermal-sprayed ceramic coatings are widely used in industry due to their favorable mechanical properties. However, traditional prone failure the differences physical properties between bonding coating and coating. In order solve this problem, a continuous transition zone was introduced coating, then air plasma spraying prepare coatings. The Vickers hardness analysis results show that existence...

The bond strength is a critical consideration for the plasma-sprayed NiCrBSi coatings. However, conventional methods testing of coatings always cost time and money. If there simple method that could predict prepared without destroying coatings, it would be significantly beneficial industrial applications. In this work, new was proposed based on total areas interfacial pores coating by plasma sp...