Protective Mo and Fe Coatings by CS and RF-ICP for PbLi Coolant Environments in Generation IV Fission Reactors

Klečka, Jakub; Babka, Lukas; Mušálek, Radek; Hadraba, Hynek; Kondás, Ján; Singh, Reeti; Pazderová, M.

doi:10.1007/s11666-022-01519-5

Cited by 1 publication

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References 39 publications

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“…The major limitation of WHA is the low melting temperature of the Ni-based matrix that lies slightly above 1500

C. In our recent experiments, we have deposited a Mo-20W (wt%) composite. This material is significantly more heat-resistant than WHA, but also offers two other advantages: Mo is relatively easy to deposit by RF [ 9 , 14 ] and, further, W shows a complete solubility in Mo. These composites were also included in this paper to show the capability of the fitting method to capture different kinds of brittle materials.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys

Kovářík

Klečka

2023

Materials

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A fitting method capable of describing the fatigue crack growth rate (FCGR) data in all stages of crack propagation by a simple Forman-style analytical formula was developed. To demonstrate its robustness, this method was used to quantify the fracture behavior of RF-plasma-sprayed W, Mo, W-Mo composite, and four selected Ni-based tungsten heavy alloys (WHA). The fitted FCGR parameters categorized the studied materials into two distinct sets. W, Mo, and W-Mo composite deposits made from inherently brittle refractory metals that contained a range of defects inherent to plasma spray process represented the first class. This class was characterized by low fracture toughness and a relatively wide range of fatigue crack growth thresholds. The second class of materials was represented by WHA. Here, the deposit defects were suppressed by liquid state diffusion that formed a typical WHA structure consisting of a Ni-rich matrix and large spherical W reinforcement particles. The WHA generally showed higher fatigue crack growth thresholds, but differed in fracture toughness values based on the W particle concentrations. The obtained fracture mechanical data represent a reference dataset of plasma-sprayed refractory materials, and their classification into groups clearly demonstrates the capabilities of the developed method to capture a wide range of different types of FCGR behavior.

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“…The major limitation of WHA is the low melting temperature of the Ni-based matrix that lies slightly above 1500

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys

Kovářík

Klečka

2023

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

Protective Mo and Fe Coatings by CS and RF-ICP for PbLi Coolant Environments in Generation IV Fission Reactors

Cited by 1 publication

References 39 publications

Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys

Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys

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