一、引言近50多年来,为防止碳的氧化,进行了许多加工工艺方法的研究。碳—碳复合材料防氧化研究成果最近显示出广泛的意义,特别是这些防氧化方法首先应用到石墨电极。加入碳基质中的添加物,大多数产生有害的影响,除磷酸盐添加剂有少数例外,能减慢氧化速率。另一种方法是在碳表面进行陶瓷涂层。但如果陶瓷热膨胀系数和碳有很大差别,则会产生许多裂缝。玻璃可用于封闭裂 First, the introduction of nearly 50 years, in order to prevent carbon oxidation, a lot of processing technology research. The research results of carbon-carbon composite anti-oxidation have recently shown broad significance. In particular, these anti-oxidation methods were first applied to graphite electrodes. Most of the additives added to the carbon matrix have detrimental effects, with the exception of phosphate additives, which slow down the rate of oxidation. Another method is to coat the carbon surface with a ceramic. However, if the coefficient of thermal expansion of ceramics is very different from that of carbon, many cracks will be generated. Glass can be used to seal the crack