ATOMIC LAYER DEPOSITION FOR TURBINE COMPONENTS
    31.
    发明申请
    ATOMIC LAYER DEPOSITION FOR TURBINE COMPONENTS 审中-公开
    用于涡轮机构的原子层沉积

    公开(公告)号:US20080038578A1

    公开(公告)日:2008-02-14

    申请号:US11877274

    申请日:2007-10-23

    申请人: Chien-Wei Li

    发明人: Chien-Wei Li

    摘要: A method and superalloy component for depositing a layer of material onto gas turbine engine components by atomic layer deposition. A superalloy component may have a ceramic thermal barrier coating on at least a portion of its surface, comprising a superalloy substrate and a bonding coat; and aluminum oxide (Al2O3) layer may be deposited on top of an yttria-stabilized zirconia layer and form a bonding coat by atomic layer deposition. The yttria-stabilized zirconia layer may have a plurality of micron sized gaps extending from the top surface of the ceramic coating towards the substrate and defining a plurality of columns of the yttria-stabilized zirconia layer. Also, atomic layer deposition may be used to lay an aluminum oxide (Al2O3) layer over a tantalum oxide (Ta2O5) layer on a silicon-based substrate. Using atomic layer deposition to coat the gas turbine engine components permits conformal coating of the columnar surface to permit gap expansion and contraction without sintering of the columnar surface or spalling of the coating, and form an oxidation resistant bonding coat.

    摘要翻译: 一种用于通过原子层沉积将材料层沉积到燃气涡轮发动机部件上的方法和超合金部件。 超级合金部件可以在其表面的至少一部分上具有陶瓷热障涂层,其包括超合金基底和粘合涂层; 并且氧化铝(Al 2 O 3 3)层可以沉积在氧化钇稳定的氧化锆层的顶部上,并通过原子层沉积形成粘结层。 氧化钇稳定的氧化锆层可以具有从陶瓷涂层的顶表面朝向衬底延伸的多个微米尺寸的间隙并且限定多个氧化钇稳定的氧化锆层的柱。 此外,原子层沉积可以用于在氧化钽(Ta 2 O 3)上铺设氧化铝(Al 2 O 3 O 3)层, SUB> 5 )层。 使用原子层沉积来涂覆燃气涡轮发动机部件允许圆柱形表面的共形涂覆以允许间隙膨胀和收缩,而不会烧结柱状表面或剥落涂层,并形成抗氧化粘合涂层。

    Oxidation barrier coatings for silicon based ceramics
    32.
    发明授权
    Oxidation barrier coatings for silicon based ceramics 有权
    硅基陶瓷的氧化阻隔涂层

    公开(公告)号:US07323247B2

    公开(公告)日:2008-01-29

    申请号:US10719629

    申请日:2003-11-21

    IPC分类号: B32B9/00

    摘要: A protective barrier coating system including a diffusion barrier coating and an oxidation barrier coating and method for use in protecting silicon-based ceramic turbine engine components. A complete barrier coating system includes a thermal barrier coating of stabilized zirconia and an environmental barrier coating of an alloyed tantalum oxide. The oxidation barrier coating includes a layer of metallic silicates formed on a substrate of silicon nitride or silicon carbide to be protected. The oxidation barrier coating can include silicates of scandium, ytterbia or yttrium. The oxidation barrier coating may also include an inner layer of Si2ON2 between the diffusion barrier and the metallic silicate layer. The oxidation barrier coating can be applied to the substrate by spraying, slurry dipping and sintering, by a sol-gel process followed by sintering, by plasma spray, or by electron beam-physical vapor deposition. The diffusion layer of essentially pure Si3N4 can be applied to the substrate to prevent the migration of damaging cations from the protective layers to the substrate and is preferably formed by chemical vapor deposition. A method for protecting silicon based substrates can comprise a step of forming an oxidation barrier coating on a substrate, where a step of forming the oxidation barrier includes a step of sintering the oxidation barrier and substrate in a wet gas containing hydrogen.

    摘要翻译: 一种包括扩散阻挡涂层和氧化屏障涂层的保护性屏障涂层系统以及用于保护硅基陶瓷涡轮发动机部件的方法。 完整的阻隔涂层系统包括稳定的氧化锆的隔热涂层和合金化氧化钽的环境屏障涂层。 氧化阻挡涂层包括在待保护的氮化硅或碳化硅的衬底上形成的金属硅酸盐层。 氧化屏障涂层可以包括钪,镱或钇的硅酸盐。 氧化阻隔涂层还可以包括扩散阻挡层和金属硅酸盐层之间的Si 2 2 2 N 2的内层。 通过喷雾,浆料浸渍和烧结,通过溶胶 - 凝胶法烧结,通过等离子体喷涂,或通过电子束 - 物理气相沉积,可将氧化阻隔涂层施加到基材上。 可以将基本上纯的Si 3 N 4 N 4的扩散层施加到基底上,以防止损伤的阳离子从保护层迁移到基底,并且优选地由化学 气相沉积。 用于保护硅基基板的方法可以包括在基板上形成氧化阻挡涂层的步骤,其中形成氧化屏障的步骤包括在含氢的湿气中烧结氧化阻挡层和基板的步骤。

    Diffusion barrier coating for Si-based components
    33.
    发明授权
    Diffusion barrier coating for Si-based components 有权
    Si基组分的扩散阻挡涂层

    公开(公告)号:US07300702B2

    公开(公告)日:2007-11-27

    申请号:US10644523

    申请日:2003-08-18

    IPC分类号: B32B9/00

    摘要: A component comprising a silicon-based substrate and a diffusion barrier coating disposed on the silicon-based substrate. The diffusion barrier coating comprises an isolation layer disposed directly on the silicon-based substrate and at least one oxygen barrier layer disposed on the isolation layer. The oxygen barrier layer prevents the diffusion of oxygen therethrough, and prevents excessive oxidation of the silicon-based substrate. The isolation layer(s) prevent contaminants and impurities from reacting with the oxygen barrier layer. An environmental barrier coating may be disposed on the diffusion barrier coating, and a thermal barrier coating may be disposed on the environmental barrier coating. Methods for making a component having a diffusion barrier coating are also disclosed.

    摘要翻译: 一种组件,包括硅基衬底和设置在硅基衬底上的扩散阻挡涂层。 扩散阻挡涂层包括直接设置在硅基衬底上的隔离层和设置在隔离层上的至少一个氧阻挡层。 氧阻隔层防止氧气扩散通过其中,并防止硅基衬底的过度氧化。 隔离层防止污染物和杂质与氧阻隔层反应。 可以在扩散阻挡涂层上设置环境屏障涂层,并且可以在环境屏障涂层上设置热障涂层。 还公开了制备具有扩散阻挡涂层的组分的方法。

    Atomic layer deposition for turbine components
    34.
    发明申请
    Atomic layer deposition for turbine components 失效
    涡轮机部件的原子层沉积

    公开(公告)号:US20050158590A1

    公开(公告)日:2005-07-21

    申请号:US10759810

    申请日:2004-01-16

    申请人: Chien-Wei Li

    发明人: Chien-Wei Li

    摘要: A method and superalloy component for depositing a layer of material onto gas turbine engine components by atomic layer deposition. A superalloy component may have a ceramic thermal barrier coating on at least a portion of its surface, comprising a superalloy substrate and a bonding coat; and aluminum oxide (Al2O3) layer may be deposited on top of an yttria-stabilized zirconia layer and form a bonding coat by atomic layer deposition. The yttria-stabilized zirconia layer may have a plurality of micron sized gaps extending from the top surface of the ceramic coating towards the substrate and defining a plurality of columns of the yttria-stabilized zirconia layer. Also, atomic layer deposition may be used to lay an aluminum oxide (Al2O3) layer over a tantalum oxide (Ta2O5) layer on a silicon-based substrate. Using atomic layer deposition to coat the gas turbine engine components permits conformal coating of the columnar surface to permit gap expansion and contraction without sintering of the columnar surface or spalling of the coating, and form an oxidation resistant bonding coat.

    摘要翻译: 一种用于通过原子层沉积将材料层沉积到燃气涡轮发动机部件上的方法和超合金部件。 超级合金部件可以在其表面的至少一部分上具有陶瓷热障涂层,其包括超合金基底和粘合涂层; 并且氧化铝(Al 2 O 3 3)层可以沉积在氧化钇稳定的氧化锆层的顶部上,并通过原子层沉积形成粘结层。 氧化钇稳定的氧化锆层可以具有从陶瓷涂层的顶表面朝向衬底延伸的多个微米尺寸的间隙并且限定多个氧化钇稳定的氧化锆层的柱。 此外,原子层沉积可以用于在氧化钽(Ta 2 O 3)上铺设氧化铝(Al 2 O 3 O 3)层, SUB> 5 )层。 使用原子层沉积来涂覆燃气涡轮发动机部件允许圆柱形表面的共形涂覆以允许间隙膨胀和收缩,而不会烧结柱状表面或剥落涂层,并形成抗氧化粘合涂层。

    Sintered silicon nitride of high toughness, strength and reliability
    37.
    发明授权
    Sintered silicon nitride of high toughness, strength and reliability 失效
    烧结氮化硅具有高韧性,强度和可靠性

    公开(公告)号:US5637540A

    公开(公告)日:1997-06-10

    申请号:US96203

    申请日:1993-07-23

    摘要: A silicon nitride sintered body has a composition consisting essentially of 85 to 94% by weight .beta. silicon nitride, 6 to 15% by weight grain boundary phase consisting essentially of (i) at least two rare earth elements, wherein yttrium is considered a rare earth, and, optionally, strontium which, calculated as SrO, is 02 percent by weight of the total body, and (ii) at least two of Si, N, O and C, and an additive consisting essentially of a metal carbon compound present in the amount of about 0.2 to 3.5% by volume. The additive is substantially homogeneously dispersed within the sintered body. The sintered body has a microstructure wherein (i) the .beta. silicon nitride grains are acicular and have an average grain width ranging from 0.5 to 1.5 .mu.m, (ii) at least 25% of the grains have width greater than 0.7 .mu.m, and at least 10% of the grains have width greater than 1 .mu.m, and (iii) no more than 5% of grains have width greater than 3.5 .mu.m and apparent aspect ratio greater than 5, with the proviso that the average aspect ratio is at least 1.8 and a fracture origin, at least 90% of which is comprised of large acicular .beta.Si.sub.3 N.sub.4 grains, the average size of which ranges from about 15 to 50 .mu.m. Such a ceramic has high strength, high toughness and long term durability, and is especially suited for industrial applications such as components for gas turbine and automotive engines.

    摘要翻译: 氮化硅烧结体具有基本上由85至94重量%的β氮化硅,6至15重量%的晶界相组成的组成,其基本上由(i)至少两个稀土元素组成,其中钇被认为是稀土 ,和任选地,以SrO计,为总体重的0.02重量%的锶和(ii)Si,N,O和C中的至少两种,以及基本上由以下物质组成的金属碳化合物 该量为约0.2-3.5%(体积)。 添加剂基本均匀地分散在烧结体内。 所述烧结体具有以下微结构:(i)所述β型氮化硅晶粒为针状,平均晶粒宽度为0.5〜1.5μm,(ii)所述晶粒的至少25%的宽度大于0.7μm, 至少10%的晶粒具有大于1μm的宽度,和(iii)不超过5%的晶粒宽度大于3.5μm,并且视在长宽比大于5,条件是平均纵横比为 至少1.8和断裂起点,其至少90%由大针状β3Si4N晶粒组成,其平均尺寸范围为约15至50μm。 这种陶瓷具有高强度,高韧性和长期耐久性,并且特别适用于诸如燃气轮机和汽车发动机的部件的工业应用。

    High toughness, high strength sintered silicon nitride
    38.
    发明授权
    High toughness, high strength sintered silicon nitride 失效
    高韧性,高强度烧结氮化硅

    公开(公告)号:US5312788A

    公开(公告)日:1994-05-17

    申请号:US76940

    申请日:1993-06-16

    摘要: A silicon nitride sintered body has a composition consisting essentially of 85 to 94% by weight .beta. silicon nitride, 6 to 15% by weight grain boundary phase consisting essentially of (i) at least two rare earth elements, wherein yttrium is considered a rare earth, and, optionally, strontium which, calculated as SrO, is 0-2 percent by weight of the total body, and (ii) at least two of Si, N, O and C, and an additive consisting essentially of a metal-carbon compound present in the amount of about 0.2 to 3.5% by volume. The additive is substantially homogeneously dispersed within the sintered body. The sintered body has a density at least 95% of theoretical and the ceramic has high strength and high toughness and is especially suited for industrial applications such as components for gas turbine and automotive engines. The sintered body has a microstructure wherein (i) the .beta. silicon nitride grains are acicular and have an average grain width ranging from 0.5 to 1.5 .mu.m, (ii) at least 25% of the grains have width greater than 0.7 .mu.m, and at least 10% of the grains have width greater than 1 .mu.m, and (iii) no more than 5% of grains have width greater than 3.5 .mu.m and apparent aspect ratio greater than 5, with the proviso that the average aspect ratio is at least 1.8.

    摘要翻译: 氮化硅烧结体具有基本上由85至94重量%的β氮化硅,6至15重量%的晶界相组成的组成,其基本上由(i)至少两个稀土元素组成,其中钇被认为是稀土 ,和任选的以SrO计为0-2重量%的锶,和(ii)Si,N,O和C中的至少两个,以及基本上由金属 - 碳组成的添加剂 化合物的存在量为约0.2-3.5%(体积)。 添加剂基本均匀地分散在烧结体内。 烧结体的密度至少为理论值的95%,陶瓷具有高强度和高韧性,特别适用于燃气轮机和汽车发动机的部件等工业应用。 所述烧结体具有以下微结构:(i)所述β型氮化硅晶粒为针状,平均晶粒宽度为0.5〜1.5μm,(ii)所述晶粒的至少25%的宽度大于0.7μm, 至少10%的晶粒具有大于1μm的宽度,和(iii)不超过5%的晶粒宽度大于3.5μm,并且视在长宽比大于5,条件是平均纵横比为 至少1.8。