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目前,国内外关于石墨材料的抗氧化涂层制作和应用及其经济效益等方面,有许多报道和专利,但涉及到抗氧化涂层基础理论方面的论述所见甚少。本文主要想就此谈一些粗浅的看法,供同志们参考。一、涂层中某些金属为什么能和石墨基体粘合从国内外各种石墨材料抗氧化涂层的配方和制作过程来看,不管涂层分为几层,其各种功能又是如何,所应用涂层中含铝量均较高,有的达75％以上。而铝是不易与碳直接生成碳化物的,且其与石墨的热膨胀系数又不一致(相差7～8倍)。为什么能在高温下与石
At present, there are many reports and patents about the manufacture and application of anti-oxidation coating of graphite material and its economic benefits at home and abroad, but there are few reports on the basic theory of anti-oxidation coating. This article mainly want to talk about some superficial views, for comrades reference. First, the coating of certain metals and why the graphite matrix adhesion From a variety of graphite materials at home and abroad antioxidant coating formulation and production process point of view, regardless of the coating is divided into several layers, and its various functions is how, The amount of aluminum in the applied coating is higher, some of which reaches more than 75%. However, aluminum is not easily formed carbide with carbon, and its thermal expansion coefficient with graphite and inconsistent (a difference of 7 to 8 times). Why can the stone with high temperature?