Spray reactive plasma

Thermal Spray Technologies Reactive Plasma Spray Forming... 

Spray-applied layers, including flame-sprayed metals, reactive sprays, high velocity sprays, cold sprays, and plasma-deposited layers of all sorts ... 

Reactive plasma spraying of silicon in controlled nitrogen atmosphere, in Thermal Spray Industrial Applications (eds C.C. Bemdt and S. Sampath), ASM International, Materials Park, OH,... 

Reactive plasma spray (RPS) is a modification of plasma spray process. In RPS, a reaction takes place between the precursor particles and the plasma or between powder particles in the plasma. Temperatures involved in plasma spray are very high (-6000-15000 °C). These high temperatures may significantly reduce the time... 

TD = thermal decomposition C = ceramic TB = Teflon-bonded RS = reactive sputtering E = electrochemical decomposition or formation SC = single crystal PJS = plasma jet spray. 

Final goal, however, is the preparation of compositionally graded materials made of Mg2(Si,Ge,Sn) crystals. The preparation of the powders by mechanical alloying and their properties after hot pressing is topic of the third section. The high reactivity of the Mg is the main difficulty which has to be overcome. For the preparrational route the problems have been solved. The next step will be the transfer to the plasma spray process. 

During plasma spraying of hydroxyapatite onto titanium alloy substrate surfaces minor amounts of highly reactive CaO are being formed by thermal decomposition that react with the native titanium oxide layer to form calcium titanate, CaTiOs. This thin reaction layer has been implicated to be an important... 

Difficult-to-process composites can be readily produced by thermal spray forming, and plasma spray is the process of choice for the most reactive matrix materials. Particulate-, fiber-, and whisker-reinforced composites have all been produced and used in various applications. Particulate-reinforced wear-resistant coatings such as WC/Co, Cr3C2/NiCr, and TiC/NiCr are the most common applications. Figure 8 illustrates the diverse forms of composites that can be thermally spray formed. Whisker particulates can be incorporated into sprayed deposits using so-called engineered powders, mechanical blending, or by... 

Alternative Technologies (e.g., powder, hot melt, thermoplastic plasma spray, radiation-cured, moisture-cured, chemical-cured, and reactive liquid) C ... 

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