Rapid synthesis of silicon carbide-carbon composites
    1.
    发明授权
    Rapid synthesis of silicon carbide-carbon composites 有权
    快速合成碳化硅 - 碳复合材料

    公开(公告)号:US09321692B2

    公开(公告)日:2016-04-26

    申请号:US12533706

    申请日:2009-07-31

    摘要: Production of pore-free carbon/carbon-silicon carbide composite materials with mechanical properties making them suitable for use in such applications as the production of aircraft landing system brake components including brake discs. The method includes: providing a porous carbon-carbon composite preform; surrounding the porous carbon-carbon composite preform with silicon powder to form an intermediate construct; applying a uniaxial load to the construct; applying direct electrical current to an assembly containing the loaded construct of porous carbon-carbon preform surrounded by silicon powder, thereby melting the silicon powder and infiltrating the pores of the carbon-carbon preform with liquid silicon; and initiating a combustion-type reaction between the silicon and carbon in the preform, thereby forming silicon carbide in the preform.

    摘要翻译: 生产具有机械性能的无孔碳/碳 - 碳化硅复合材料,使其适用于诸如生产飞机着陆系统制动部件(包括制动盘)的应用。 该方法包括:提供多孔碳 - 碳复合预型体; 用硅粉围绕多孔碳 - 碳复合预制件以形成中间构件; 对结构施加单轴载荷; 将直流电流施加到包含由硅粉包围的多孔碳 - 碳预制件的负载构造物的组件上,由此熔化硅粉末并用液态硅渗透碳 - 碳预型体的孔隙; 并在预成型件中引发硅和碳之间的燃烧型反应,从而在预成型件中形成碳化硅。

    Antioxidant system for carbon-carbon brake materials with enhanced resistance to humidity exposure
    2.
    发明申请
    Antioxidant system for carbon-carbon brake materials with enhanced resistance to humidity exposure 有权
    碳 - 碳制动材料的抗氧化系统具有增强的抗潮湿暴露性

    公开(公告)号:US20060008647A1

    公开(公告)日:2006-01-12

    申请号:US10885303

    申请日:2004-07-06

    IPC分类号: B32B9/00

    摘要: Method of improving humidity resistance in a coated article (19) comprising a carbon-carbon composite component (10), a graphite component (10), or a ceramic matrix composite component based on carbon fibers and/or graphite (10). The component (10) is preferably configured as an aircraft landing system brake disc. The method includes the steps of: (A) providing a carbon-carbon composite component (10), a graphite component (10), or a ceramic matrix composite component based on carbon fibers and/or graphite (10); (B) covering the component (10) with a phosphorus-containing antioxidant undercoating (11) having a thickness of approximately 1-10 mil; and (C) covering the resulting undercoated component (10, 11) with a boron-containing glass overcoating (12) having a thickness of approximately 1-10 mil. The overcoating includes 20-50 wt-% alkali or alkaline earth metal silicates, 3-25 wt-% alkali metal hydroxide, up to 10 wt-% boron nitride, and one or both of 5-40 wt-% elemental boron and 5-40 wt-% boron carbide. The overcoating is substantially free of phosphoric acid and phosphates. Also, articles coated with the specified undercoating/overcoating combinations.

    摘要翻译: 包含碳 - 碳复合组分(10),石墨组分(10)或基于碳纤维和/或石墨(10)的陶瓷基复合材料组分的涂覆制品(19)中的耐湿性改善方法。 组件(10)优选地被配置为飞机着陆系统制动盘。 该方法包括以下步骤:(A)提供基于碳纤维和/或石墨(10)的碳 - 碳复合组分(10),石墨组分(10)或陶瓷基复合组分; (B)用含有约1-10密耳厚度的含磷抗氧化剂底漆(11)覆盖组分(10); 和(C)用厚度为约1-10密耳的含硼玻璃外涂层(12)覆盖所得的底涂层组分(10,11)。 外涂层包括20-50重量%的碱金属或碱土金属硅酸盐,3-25重量%的碱金属氢氧化物,至多10重量%的氮化硼,以及一个或两个5-40重量%的元素硼和5个 -40重量%的碳化硼。 外涂层基本上不含磷酸和磷酸盐。 另外,用指定的底漆/外涂组合涂覆的物品。