Wear of NiTi coatings obtained by thermal spraying

Cinca, N.; Isalgué, A.; Fernández, J.; Cano, I.G.; Dosta, S.; Guilemany, J.M.

doi:10.1051/esomat/200906007

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Many investigations have been carried out to prepare NiTi coatings or films with cavitation and erosion resistance. These NiTi coatings are generally prepared by explosive welding [20,21], low pressure plasma spray process (LPPS, used to be called VPS) [4,15,22,23], air plasma spraying (APS) [22][23][24], high velocity oxy-fuel spray (HVOF) [22][23][24][25], tungsten inert gas (TIG) [26], laser [27,28], laser plasma hybrid spraying [29,30], sputter depositing [31], cold spraying [32,33] and modified high-velocity oxygen fuel spraying process (so called low temperature HVOF) [34][35][36][37]. Many researchers studied the cavitation erosion resistance of NiTi coatings.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Erosion and Jet Impingement Erosion Behavior of the NiTi Coating Produced by Air Plasma Spraying

Shi

Wang

et al. 2018

Coatings

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Cavitation erosion and jet impingement erosion can result in a great loss of materials. NiTi alloy is a very promising candidate to acquire cavitation erosion resistance and jet impingement erosion resistance because of its superelasticity. Due to the high cost and poor workability of NiTi alloy, many people tried to overcome such drawbacks by preparing NiTi coatings on the basis of deteriorating the good properties as little as possible. From the aspect of the application of NiTi coating, the erosion resistance should be evaluated comprehensively. One of these evaluations involves the comparison of cavitation erosion resistance and jet impingement erosion resistance of NiTi. This evaluation has not been made thus far. Thus, in this study, the NiTi coating was prepared by air plasma spraying (APS) using pre-alloyed NiTi powder. Its microstructure, chemical composition and phase transformation were identified. Cavitation erosion behavior and jet impingement erosion behavior of the as-sprayed NiTi coating were compared. The results showed that the coating exhibited better jet impingement erosion resistance than cavitation erosion resistance. This was attributed to the oxides, impurities, cracks and pores that existed in the coating, whose effects on deteriorating the cavitation erosion were far greater than those worsening the jet impingement erosion.

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Section: Introductionmentioning

confidence: 99%

Cavitation Erosion and Jet Impingement Erosion Behavior of the NiTi Coating Produced by Air Plasma Spraying

Shi

Wang

et al. 2018

Coatings

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“…1. UVOD U rigoroznim uslovima eksploatacije, za zaštitu metalnih konstrukcija koriste se različiti premazi i prevlake sa dobrom kombinacijom mehaničkih svojstava (tvrdoće i čvrstoće), otpornosti na habanje, otpornosti na koroziju i kavitaciju [1][2][3][4][5]. Primena ovih sredstava doprinosi povećanju otpornosti metalnih površina i opravdana je s obzirom da je razaranje pod dejstvom kavitacije površinski degradacioni proces [6].…”

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Coating based on basalt protection metal structures

Pavlovic¹,

Dojčinović²,

Andric³

et al. 2021

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The paper present the results of the synthesis of a new refractory coating based on basalt for the protection of metal construction under conditions of cavitation. Initial basalt samples obtained from the locality Vrelo - Kopaonik. The basalt based refractory filler was obtained by crushing and grinding selected samples of basalt rock. XRD, SEM and optical microscopy methods were used to characterize the obtained filler samples. The research defined the composition of basalt -based coating with epoxy resinbased binder, organic additives and organic solvent. The resistance properties of protective coatings applied to metal surface were investigated using the ultrasonic vibration method with a stationary sample according to the ASTM G 32 standard. To evaluate the resistance of the sample surface to the action of cavitation, the sample surface was examined before and during testing. The surface of the samples was monitored by scanning electron microscopy in order to analyze the morphology of surface damage. Computer image analysis according to the Image Pro Plus program was applied to assess the damage to the sample surface. The obtained test results showed high resistance of the coating layers to the effect of cavitation, with small mass losses, small damage to the coating surface and a cavitation rate of 0,1 mg/min.

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