Strength degradation mechanisms in h-BN/NiAl coated sapphire fibres with a reactive Hf or Y interlayer

Bonding strength between fibers and matrices of ceramic matrix composites (CMCs) is of great importance for the fracture behavior and can be adjusted by appropriate fiber coatings. In this study, the continuous coating of SiBNC fibers with hexagonal boron nitride (h‐BN) by CVD from TMB in an atmospheric pressure reactor is presented. Prior to fiber coating, the effects of deposition parameters, e.g., deposition temperature, concentration of the precursor and ammonia addition, and gas‐flow rate are investigated on flat Si substrates, and the results are utilized for the fiber coating. Ammonia concentration has no influence on the deposition rate. A maximum deposition rate of 0.044 kg m−2 h−1 for static conditions and 0.040 kg m−2 h−1 for continuous conditions can be achieved, which is comparable to the literature. The depositions are characterized for their composition and structure. Smooth homogeneous coatings with a thickness of 180–250 nm are found on the fibers. High‐resolution transmission electron microscopy (HRTEM) of the coated SiBNC fibers reveals that the hexagonal BN with 5 nm basal planes is mainly randomly oriented.

show abstract

Deposition of Hexagonal Boron Nitride from N‐Trimethylborazine (TMB) for Continuous CVD Coating of SiBNC Fibers

Graupner

Krüger

2012

Chemical Vapor Deposition

View full text Add to dashboard Cite

show abstract

BN/SiBCN light-leakage-proof coatings of silica optical fiber for long term sensors at high temperatures

Luan

et al. 2021

Chinese Journal of Aeronautics

View full text Add to dashboard Cite

Strength degradation of NiAl coated sapphire fibres with a V2AlC interlayer

Gebhardt

Hajas

Scholz

et al. 2009

Materials Science and Engineering: A

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Strength degradation mechanisms in h-BN/NiAl coated sapphire fibres with a reactive Hf or Y interlayer

Cited by 5 publications

References 20 publications

Deposition of Hexagonal Boron Nitride from N‐Trimethylborazine (TMB) for Continuous CVD Coating of SiBNC Fibers

Deposition of Hexagonal Boron Nitride from N‐Trimethylborazine (TMB) for Continuous CVD Coating of SiBNC Fibers

BN/SiBCN light-leakage-proof coatings of silica optical fiber for long term sensors at high temperatures

Strength degradation of NiAl coated sapphire fibres with a V2AlC interlayer

Contact Info

Product

Resources

About