Boron Nitride powder containing suspensions(MYCRONID~(TM))were developed for applications in aluminum processing(e.g.as coatings for foundry consumables in non-pressure applications).MYCRONID~(TM)suspensions consist of dispersed hexagonal BN-particles(1-10 mu m)in a reactive TEOS derived sol-gel-binder.These suspensions are applied by conventional coating technologies.After drying and firing(500°C)dense,wear resistant glass ceramic-BN composite layers in the range of 3-20 mu m were obtained.Coated substrates(hot-work steel or conventional refractory ceramics)were exposed to Al-melts at temperatures of 750°C and showed excellent corrosion resistance,oxidation protection and thermal stress stability.It was observed,that only with thoroughly cleaned and pretreated substrates,the excellent results were achieved.
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机译：含有悬浮液的氮化硼粉末（Mycronid〜（TM））用于铝加工中的应用（非压力应用中的铸造厂涂料的涂层）.Mycronid〜（TM）悬浮液由分散的六方BN-颗粒组成（1-10 Mu m）在反应性Teos衍生的溶胶 - 凝胶 - 粘合剂中。这些悬浮液通过常规涂布技术施加。干燥和烧制（500℃）致密，耐磨玻璃陶瓷-BN复合层3-20μm获得M.在750℃的温度下将涂覆的基板（热加工钢或常规耐火陶瓷）暴露于Al-熔体，并显示出优异的耐腐蚀性，氧化保护和热应力稳定性。观察到，只有彻底清洁和预处理的基材，实现了优异的结果。
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