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    • 157. 发明授权
    • Oxidation resistant diamond composite and method of forming the same
    • 耐氧化金刚石复合材料及其形成方法
    • US5421976A
    • 1995-06-06
    • US231224
    • 1994-04-20
    • Glenn A. Holmquist
    • Glenn A. Holmquist
    • C04B41/52C04B41/89C23C14/02C23C14/08G02B1/02G02B1/10G02B1/11C23C14/34
    • C04B41/89C04B41/52C23C14/022C23C14/083G02B1/105G02B1/11Y10T428/24975Y10T428/265Y10T428/30
    • The improved diamond composite (10) exhibits increased oxidation resistance at elevated temperatures, as well as anti-reflective properties. The composite (10) includes a diamond (12), the surfaces (14) of which are protected by an adherent coating (16) consisting essentially of a layer (18) of hafnium carbide adhering and chemically bonded to the diamond (12), a layer (20) of hafnium oxy-carbide adhering and chemically bonded to the hafnium carbide layer (18) and an oxidation-resistant layer (22) of hafnium oxide adhering and chemically bonded to the hafnium oxy-carbide layer (20). Preferably, the coating (16) is sufficiently thin so that it or at least the hafnium oxide layer (22) thereof has about one-quarterwavelength thickness. The method of forming the composite (10) employs sputtering hafnium metal in an argon atmosphere, preferably at about 100-150 degrees Celsius, to form the hafnium carbide layer (18), then continuing the sputtering in an oxygen and argon mixture to first form the hafnium oxy-carbide layer (20) and then the hafnium oxide layer (22). The sputtering is followed by heat treating the composite (10) in an oxygen atmosphere at preferably about 350-450 degrees Celsius for about 4-24 hours to assure full utilization of the hafnium metal. This method is simple, inexpensive and effective.
    • 改进的金刚石复合材料(10)在高温下表现出增加的抗氧化性以及抗反射性能。 复合材料(10)包括金刚石(12),其表面(14)由粘附涂层(16)保护,粘合涂层(16)基本上由粘附并化学键合到金刚石(12)的碳化铪层(18)组成, 粘附并化学键合到所述铪碳化物层(18)的氧化铪铪层(20)和与所述铪氧化碳层(20)粘合并化学键合的氧化铪的抗氧化层(22)。 优选地,涂层(16)足够薄,使得其或至少其氧化铪层(22)具有约四分之一波长厚度。 形成复合材料(10)的方法在氩气气氛中优选在约100-150摄氏度下使用溅射铪金属,以形成碳化铪层(18),然后在氧气和氩气混合物中继续溅射以形成第一形式 铪氧化碳层(20),然后是氧化铪层(22)。 接着在氧气氛中优选约350-450摄氏度下对复合材料(10)进行热处理约4-24小时,以确保充分利用铪金属。 这种方法简单,价格低廉。