Microstructure and wear of thermal sprayed composite NiAl-based coatings

Microstructure and Wear-Resistant Properties of Ni80Al20-MoS2 Composite Coating on Sled Track Slippers

“…Although the depressions and prominences are fewer, and the unmelted powder particles are decreased, plenty of micropores still exist, and porosity of the coating drops from 16% in Figure 5b to 13% in Figure 5d, as shown in Figure 5c,d. This indicates that the ion beam energy is increasing with the increase of the spraying power [13,17]. Under this condition, the fully melted particles, flying at a high speed, impact the surface of the substrate and spread along it, forming a thicker coating.…”

“…There are many micropores in the sectional structure and small holes at the bonding interface between the coating and the substrate. It is the combined effect of the low spraying power, low ion beam energy and low temperature [13]. The powder particles are not melted at all or are only melted on the surface, so the fusant has bad fluidity [16], which causes a rough surface and loose micro-structure.…”

“…Galetz researched the microstructural degradation and interdiffusion behavior of the NiAl coating on a 602 CA alloy, and the results showed that the coating was of structural integrity and highly protective [12]. O. Poliarus reported on NiAl coatings fabricated by the atmospheric plasma spray technique and its wear behavior [13]. Moreover, MoS 2 can be used as a solid anti-attrition and lubricating coating because of its good self-lubricating and friction-reduction performances.…”

Effect of Plasma Cladding Speed on the Microstructure and Properties of ZrC-ZrB2/NiAl Coating

“…Metal-matrix composite (MMC) coatings have excellent properties, such as specific stiffness, good thermal conductivity and good corrosion resistance, high modulus, stability at high temperature and wear resistance [2][3][4] . They are comprehensive applied as promising candidates of advanced materials.…”

Preparation and high-temperature wear behavior of NiAl-Ti3AlC2 fabricated by thermal explosion

“…Several studies reported on NiAl-based materials established that the addition of ceramic in NiAl alloy could improve the high-temperature of the composite due to the higher hardness, higher thermal stability and grain refinement of the ceramics [7,8]. In this context, some novel NiAl-based composites, such as NiAl-CrB 2 [9], NiAl-Al 3 O 2 [10], NiAl-TiC-ZrO 2 [11], NiAl-Ti 3 SiC 2 [12], NiAl-WC [13][14][15][16] was produced via highpressure reaction sintering, mechanical alloying, hot isostatic pressing, combustion synthesis, etc. In these NiAlbased composites, the ceramics particles used as lubricant additives can obviously improve the hightemperature wear resistance.…”