以多种金属磷酸盐和磷酸作为主料，以硼酸和酸溶性金属氧化物为辅料，再加入少量磷酸盐改性剂，配制成改性磷酸盐涂料。采用溶胶凝胶工艺在炭／炭复合材料上形成涂层。涂层炭／炭复合材料试样在高温空气气氛中进行热震试验和恒温氧化试验，结果表明改性磷酸盐涂层对炭／炭复合材料具有良好的氧化抑制作用。该涂层所用原材料价格低廉，成形工艺简便，具有良好的可操作性。 To a variety of metal phosphate and phosphoric acid as the main ingredient, boric acid and acid-soluble metal oxide as an adjuvant, then add a small amount of phosphate modifier, formulated as a modified phosphate coating. A sol-gel process was used to form a coating on the carbon / carbon composite. The thermal shock test and thermostatic oxidation test of coated carbon / carbon composite samples in high temperature air atmosphere showed that modified phosphate coatings had good oxidation inhibition on carbon / carbon composites. The raw materials used in the coating are cheap, the shaping process is simple, and the operability is good.