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✦   LIBER   ✦

Oxidation Protection of Graphite by BN Coatings

✍ Scribed by Anatoliy Nechepurenko; Sergey Samuni

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
110 KB
Volume
154
Category
Article
ISSN
0022-4596

No coin nor oath required. For personal study only.

✦ Synopsis

Increasing the service life of di4erent graphite parts at high temperatures is very important in many industrial applications. One way to achieve this objective is to produce oxidation protection coatings of boron nitride on graphite substrates. The chemical inertness and oxidation resistance of boron nitride has led researchers to consider this material as one of the best coatings to protect graphite against oxidation. Many aspects of obtaining nitride coatings on graphite substrates by forming a boron nitride layer in a heterophase process have been investigated. Oxidation tests performed on the coated graphite have revealed a high e7ciency of boron nitride coating for graphite protection. As compared with that of uncoated specimens the oxidation resistance of BN-coated graphite substrates was 8 times higher at 7503C and 12 times higher at 12003C. The studies have shown that boron nitride coatings can e4ectively protect carbon materials against oxidation and increase the service life of these materials at high temperatures.

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