Influence of feedstock powder characteristics and spray processes on microstructure and properties of WC–(W,Cr)2C–Ni hardmetal coatings

Berger, Lutz‐Michael; Saaro, S.; Naumann, T.; Kašparová, Michaela; Zahálka, František

doi:10.1016/j.surfcoat.2010.07.032

Cited by 45 publications

(23 citation statements)

References 5 publications

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“…However, it also contains a minority of carbides with the size approaching 2 lm. In the coating, the WC carbides are combined with (W,Cr) 2 C carbides with varying content of Cr (Ref 32,33). In the case of carbides and nitrides in the ((Ti,Mo)C,N)-NiCo coatings, the size is rather difficult to estimate because of the special core-rim structure of hard phases, but it could be evaluated as smaller than three micrometers.…”

Section: Methodsmentioning

confidence: 99%

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

et al. 2011

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Elastic-plastic properties, namely, hardness and YoungÕs modulus, of four HVOF-sprayed hardmetal coatings were measured by instrumented indentation using Oliver-Pharr method Nanoindenter XP MTS with a continuous stiffness measurement (CSM) module. The results show that with sufficient number of CSM measurements, one can distinguish between indents made in the hard particles and indents made in the binder material. This can be accomplished by analyzing the plots of hardness and YoungÕs modulus versus load (or versus indentation depth). Further development of the dependence curves enables the load (or indentation depth) to be set to correspond to the point of transition from a single structure component to the composite material and to determine the properties of both. Comparison of results of CSM measurement with the results of single indentation measurement at a defined load reveals a new perspective on the origin of the indentation size effect in hardmetal coatings. The measurements show that the increase in both the hardness and YoungÕs modulus with decreasing load is caused mainly by the predominant influence of hard particles in the coatings.

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Section: Methodsmentioning

confidence: 99%

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

et al. 2011

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“…Currently, there are variations in contents of the components in the range of 1-4 % from different manufacturers [2,3]. The composition contains a lower binder metal content than other WC-based compositions but can be sprayed with a high deposition efficiency [15,16].…”

Section: Wc-20"cr3c2"-7nimentioning

confidence: 99%

“…The metallurgical processes during feedstock powder preparation and spraying for this composition have been studied in detail only recently [11,15,16]. The most specific feature is the formation of (W,Cr)2C.…”

Section: Wc-20"cr3c2"-7nimentioning

confidence: 99%

“…The occasional absence or occurrence of (W,Cr)2C might be one reason why the feedstock powders of this composition are currently traded with different designations such as WC-'CrC'-Ni, WC-'Cr3C2'-Ni or WC-NiCr [2,15,16].…”

Section: Wc-20"cr3c2"-7nimentioning

confidence: 99%

“…Unlike WC-Co and Cr3C2-NiCr, WC-(W,Cr)2C-Ni is not a simple binary hard phase-binder metal composite. The (W,Cr)2C as the second hard phase is inhomogeneously distributed in the feedstock powders and coatings [2,15,16]. Although the structure of (W,Cr)2C is described in the literature, e.g.…”

Section: Wc-20"cr3c2"-7nimentioning

confidence: 99%

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Binary WC- and Cr₃C₂-containing hardmetal compositions for thermally sprayed coatings

Berger

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.Compositions of thermally sprayed hardmetal coatings for wear protection are based on the hard materials WC and Cr3C2 with Co and Ni as the most important binders, which are often alloyed with Cr. There are a few commercial compositions containing WC and Cr3C2 together, which have a high potential for the improvement of coating properties, in particular for service in corrosive environments and high temperature applications. However, the combined application of WC and Cr3C2 in the coating compositions leads to very complex reactions between these components both during feedstock powder preparation and the spray process. This contribution summarizes the knowledge about the interactions of WC and Cr3C2 for the most important commercially available compositions: WC-10Co-4Cr, WC-20'CrC'-7Ni, 45Cr3C2-37WC-18NiCo. These three compositions show remarkable differences of the interaction between WC and Cr3C2 and the coating properties.

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Processing of Ceramic and Cermet Composite Coatings for Strategic and Aerospace Applications

Krishna¹,

Babu²,

Tak³

et al. 2020

Handbook of Advanced Ceramics and Composites

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Influence of feedstock powder characteristics and spray processes on microstructure and properties of WC–(W,Cr)2C–Ni hardmetal coatings

Cited by 45 publications

References 5 publications

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

Binary WC- and Cr₃C₂-containing hardmetal compositions for thermally sprayed coatings

Processing of Ceramic and Cermet Composite Coatings for Strategic and Aerospace Applications

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Influence of feedstock powder characteristics and spray processes on microstructure and properties of WC–(W,Cr)2C–Ni hardmetal coatings

Cited by 45 publications

References 5 publications

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

The Instrumented Indentation Study of HVOF-Sprayed Hardmetal Coatings

Binary WC- and Cr3C2-containing hardmetal compositions for thermally sprayed coatings

Processing of Ceramic and Cermet Composite Coatings for Strategic and Aerospace Applications

Contact Info

Product

Resources

About

Binary WC- and Cr₃C₂-containing hardmetal compositions for thermally sprayed coatings