On an aircraft carrier, when the carrier-based aircraft takes off, whether it is a catapult takeoff or a skid takeoff, an inclined rectangular deck will be erected at the rear of the carrier-based aircraft. It can be called a flame shield.

Regardless of the small size of the deflector, the effect is not small. It consists of high temperature resistant materials and a cooling system. Its interior is still hollow. Water-cooled pipes must be laid to cool down in time and arranged behind the take-off of the fighter. When the carrier-based aircraft takes off, the engine will emit a powerful tail jet. If it reaches the afterburner state, it will also emit a long flame, which will often reach a thousand degree heat flow. The deflector must withstand the test of the flames and protect the deck, instruments and personnel of the aircraft carrier. At the same time, the last batch of fighters of the aircraft carrier frequently took off. The deflectors should be used for a long time and repeatedly. The deflectors should have "endurance". The material and process of the protective coating are one of the core technologies of modern aircraft carriers.

It is reported that the Liaoning aircraft carrier was sprayed with a high temperature resistant silicon carbide (SiC) coating. SiC is commonly known as silicon carbide, also known as carborite, which is a typical covalent bond compound, which almost does not exist in nature. In 1890, Eword and G. Acheso prepared silicon carbide by adding silicon to carbon as a catalyst to synthesize diamond. Silicon carbide has two kinds of α-SiC and β-SiC, usually α-SiC is hexagonal or rhombohedral, and β-SiC is cube. α-SiC is a high-temperature type, and β-SiC is a low-temperature type. When the temperature is above 2100 ° C, β-SiC is transformed into α-SiC. After SiC oxidation, a layer of SiO2 film can be formed on the surface, and its oxidation resistance is good at a high temperature of 1500 ~ 1600 ° C. In addition, SiC has other excellent physical and chemical properties, such as high melting point, high hardness, and corrosion resistance. Therefore, it has broad application prospects in aerospace, weaponry and other fields. However, SiC itself cannot be used as a structural material, and a coating method is usually used to take advantage of its wear resistance and ablation resistance.