Application of solution precursor spray techniques to obtain ceramic films and coatings

Pawłowski, Lech

doi:10.1016/b978-0-85709-769-9.00005-1

Cited by 9 publications

(15 citation statements)

References 42 publications

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“…Since the beginning of 21st century, there has been rapid development in nanostructured coating deposition using the SPPS process as reflected by a number of published articles [15][16][17][18][19][20][21][22]. However, most of the accounted papers focus on the deposition of ceramic materials alone and only a few have been reported on SPPS coating deposition for cermets (ceramic-metal composite) because of the oxidation potential of the metal-ions in the solution precursor [10,15].…”

Section: Solution Precursor Plasma Spraying Of Cermetsmentioning

confidence: 99%

“…Different phenomena occur when the injected solution makes contact with the plasma jet, as discussed in many studies [17,22,[35][36][37], are presented in this section in a chronological way. Initially, the liquid stream or large droplets break-up into small droplets due to the strong shear stress of the plasma flow [36].…”

Section: Phenomena In Flightmentioning

confidence: 99%

“…Mechanical injectors may use motor rollers to control the flow rate of the solution stream [22]. The formation of droplets from this stream is induced by an aerodynamic breakup through constant application of pressure, as shown in Figure 5A [17].…”

Section: Injection Of Solution Feedstockmentioning

confidence: 99%

“…However, the good penetration of the stream of solution requires that the dynamic pressure of the solution is greater than the dynamic pressure of the plasma. This may be mathematically expressed as [17,22]:…”

Section: Injection Of Solution Feedstockmentioning

confidence: 99%

“…The chemistry of solution precursors, their concentration and solvent used, determine the characteristics of the resulting coatings [10,[22][23][24][25][26][27][28][29]. The spraying process is accompanied by the decomposition of the precursor at the elevated temperature and high heat transfer of the plasma jet [10,[22][23][24][25]. …”

Section: Solution Precursor Preparationmentioning

confidence: 99%

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Current Progress in Solution Precursor Plasma Spraying of Cermets: A Review

Unabia

Candidato

Pawłowski

2018

Metals

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Ceramic and metal composites, known also as cermets, may considerably improve many material properties with regards to that of initial components. Hence, cermets are frequently applied in many technological fields. Among many processes which can be employed for cermet manufacturing, thermal spraying is one of the most frequently used. Conventional plasma spraying of powders is a popular and cost-effective manufacturing process. One of its most recent innovations, called solution precursor plasma spraying (SPPS), is an emerging coating deposition method which uses homogeneously mixed solution precursors as a feedstock. The technique enables a single-step deposition avoiding the powder preparation procedures. The nanostructured coatings developed by SPPS increasingly find a place in the field of surface engineering. The present review shows the recent progress in the fabrication of cermets using SPPS. The influence of starting solution precursors, such as their chemistry, concentration, and solvents used, to the micro-structural characteristics of cermet coatings is discussed. The effect of the operational plasma spray process parameters such as solution injection mode to the deposition process and coatings' microstructure is also presented. Moreover, the advantages of the SPPS process and its drawbacks compared to the conventional powder plasma spraying process are discussed. Finally, some applications of SPPS cermet coatings are presented to understand the potential of the process.

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