Influence of the metallic matrix ratio on the wear resistance (dry and slurry abrasion) of plasma sprayed cermet (chromia/stainless steel) coatings

Ageorges, Hélène; Ctibor, Pavel; Medarhri, Z.; Touimi, Said; Fauchais, Pierre

doi:10.1016/j.surfcoat.2006.04.038

Cited by 12 publications

(7 citation statements)

References 11 publications

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“…This may be the reason for the lower wear rates at higher rotational speeds. Similar observations have been reported by other investigators as well [13,14]. Figure 7 shows the effect of the slurry bath temperature on the abrasive slurry wear behavior of the substrate (carbon steel) and hardfaced (stainless steel, cobalt and nickel based) surfaces.…”

Section: Effect Of Speed Of Rotation On Abrasive Slurry Wearsupporting

confidence: 86%

Comparative evaluation of the abrasive slurry wear behavior of alloy surfaces produced by a Plasma Transferred Arc hardfacing process

2010

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Abrasive slurry wear is generally defined as a mechanical interaction in which the material becomes lost in a surface that is in contact with moving particles, such as laden liquid. Slurry wear abrasion occurs in extruders, slurry pumps, and pipes that carry the slurry of minerals and ores in mineral processing industries. The life of the components used under slurry abrasion conditions is governed by the process parameters, the properties of the abrasive particles in the slurry, and the material properties. This paper analyses in detail the effects of operating variables, such as abrasive particle size, slurry concentration, speed of rotation, and slurry bath temperature, on the abrasive slurry wear behavior of a iron based alloy (stainless steel), cobalt based alloy (stellite), and nickel based alloy (colmonoy) surfaces produced by a Plasma Transferred Arc (PTA) hardfacing process. Of the four variables considered in this investigation, it was found that the slurry concentration had a predominant effect on the wear rate of hardfaced surfaces compared to the other variables. Microstructural analyses of the worned surfaces were carried out using SEM. Both the experimental and mathematical investigations showed that the wear resistance of an iron based alloy was 4 times better than the base metal. Similarly, the cobalt based alloy exhibited a 3 times higher wear resistance while the nickel based alloy showed a 2 times higher wear resistance compared to the base metal (carbon steel).

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Section: Effect Of Speed Of Rotation On Abrasive Slurry Wearsupporting

confidence: 86%

Comparative evaluation of the abrasive slurry wear behavior of alloy surfaces produced by a Plasma Transferred Arc hardfacing process

2010

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“…On the other hand, some of nonoxides ceramics can also be sprayed by APS, namely carbides, nitrides, and borides [18,19]. Similarly, the cermet coatings can be APS deposited [20][21][22]. A typical image of the powder feedstock, as well as manufactured coatings by APS method is presented in Figure 3.…”

Section: S L-s L-evmentioning

confidence: 99%

Review of Functionally Graded Thermal Sprayed Coatings

et al. 2020

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The paper briefly describes major thermal spray techniques used to spray functionally graded coatings such as atmospheric plasma spraying, high velocity oxy-fuel spraying, suspension and solution precursor plasma spraying, and finally low and high pressure cold gas spray method. The examples of combined spray processes as well as some examples of post spray treatment including laser and high temperature treatments or mechanical one, are described. Then, the solid and liquid feedstocks used to spray and their properties are shortly discussed. The reviewed properties of functional coatings include: (i) mechanical (adhesion, toughness, hardness); (ii) physical (porosity, thermal conductivity and diffusivity, thermal expansion, photo-catalytic activity), and; (iii) bioactivity and simulated body fluid (SBF) corrosion. These properties are useful in present applications of functionally graded coatings as thermal barriers, the bioactive coatings in prostheses, photo-catalytic coatings in water treatment, coatings used in printing industry (anilox and corona rolls). Finally, some of the future possible fields of functional thermal sprayed coatings applications are discussed, e.g., to coat polymer substrates or to use the cheap technology of low pressure cold gas spray method instead of expensive technology of vacuum plasma spraying to obtain bond coatings.

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“…Instead of using cermet powders, metal and ceramic powders can be sprayed separately as demonstrated by Ageorges et al [195] with Cr 2 O 3 and stainless steel powders. Increasing the stainless steel percentage increased the coating cohesion, while more Cr 2 O 3 in coatings resulted in higher hardness and lower weight losses during wear tests in dry abrasion.…”

Section: Cermetsmentioning

confidence: 99%