Evaluation of braze bonded hard complex boride based coatings for sliding, erosion and abrasion wear

Palanisamy, Barath; Upadhyaya, Anish; Anand, K.

doi:10.1016/j.wear.2008.12.060

Cited by 5 publications

(2 citation statements)

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“…At 1473 K (1200°C), a permanent liquid phase is formed in which the ternary borides dissolve and reprecipitate. The reactions were discussed elsewhere [2] and can also be observed to follow the reaction boronizing sintering mechanism. [11] As the cermet braze microstructure develops, bonding with the substrate occurs simultaneously.…”

Section: Resultsmentioning

confidence: 99%

“…Though boride cermets can be a potential replacement for tungsten carbide cermets in the cutting tool industry, their good wear resistance to abrasion, erosion, and high-temperature sliding wear can also improve component life. [2] Reaction brazing is a process where precursors interact at high temperatures to develop a ceramic-metal dispersed composite structure. The synthesis involves deploying the precursors in the form of a tape cast sheet on the surface of the substrate followed by thermal cycling.…”

Section: Introductionmentioning

confidence: 99%

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Reactive Boride Brazing on Low-Alloy Automotive Grade Steel

Palanisamy

Upadhyaya

2011

Metall Mater Trans A

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Brazing is a widely used process to improve the performance of steels used in automotive applications. The substrate material is often exposed to harsh conditions in these applications and may affect the service life of the component. Reactive boride brazing aims to improve the mechanical properties of the substrate material by forming a ceramic-metal composite coating in a single-step process in situ. In this study, sintered Ancor 4300 low-alloy steel is used as the substrate with chromium-rich braze and chromium-lean braze materials. The mechanical properties of the brazed samples were studied in detail using microindentation hardness measurements and the transverse rupture test. The results indicate that the brazed superlayer has a 10 times higher hardness. There was a significant improvement in the transverse rupture strength of the steel brazed with the chromium-rich boride as compared to the pure substrate material. In an effort to reduce processing time, green compacts of the substrate were also directly brazed and yielded favorable results.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%