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    • 8. 发明授权
    • Oxidation resistant slurry coating for carbon-based materials
    • 碳基材料的抗氧化浆料涂料
    • US4535035A
    • 1985-08-13
    • US571617
    • 1984-01-17
    • James L. SmialekGeorge C. Rybicki
    • James L. SmialekGeorge C. Rybicki
    • C04B41/51C04B41/88C23C24/10B05D3/02
    • C23C24/106C04B41/009C04B41/5144C04B41/88
    • An oxidation resistant coating is produced on carbon-base materials, and the same processing step effects an infiltration of the substrate with silicon containing material. The process comprises making a slurry of nickel and silicon powders in a nitrocellulose lacquer, spraying onto the graphite or carbon-carbon substrate, and sintering in vacuum to form a fused coating that wets and covers the surface as well as penetrates into the pores of the substrate.Optimum wetting and infiltration occurs in the range of Ni-60 w/o Si to Ni-90 w/o Si with deposited thicknesses of 25-100 mg/cm.sup.2. Sintering temperatures of about 1200.degree. C. to about 1400.degree. C. are used, depending on the melting point of the specific coating composition.The sintered coating results in Ni-Si intermetallic phases and SiC, both of which are highly oxidation resistant. The final coating composition can be further controlled by the length of the sintering time.
    • 在碳基材料上产生抗氧化涂层,并且相同的加工步骤使含硅材料渗透基材。 该方法包括在硝化纤维素漆中制备镍和硅粉末的浆料,喷涂到石墨或碳 - 碳基底上,并在真空中烧结以形成熔化和覆盖表面的熔融涂层,并且渗透到 基质。 在Ni-60 w / o Si至Ni-90 w / o Si的范围内发生最佳的润湿和渗透,沉积厚度为25-100 mg / cm2。 根据特定涂料组合物的熔点,使用约1200℃至约1400℃的烧结温度。 烧结涂层导致Ni-Si金属间相和SiC,两者都具有高度抗氧化性。 可以通过烧结时间的长度来进一步控制最终的涂料组合物。