Corrosion resistant sealant for EBC of silicon-containing substrate and processes for preparing same
    32.
    发明申请
    Corrosion resistant sealant for EBC of silicon-containing substrate and processes for preparing same 审中-公开
    含硅基材的EBC耐腐蚀密封剂及其制备方法

    公开(公告)号:US20060280955A1

    公开(公告)日:2006-12-14

    申请号:US11150100

    申请日:2005-06-13

    摘要: An article comprising a silicon-containing substrate, an environmental barrier coating (EBC) overlying the substrate, wherein the EBC comprises an outer alkaline earth aluminosilicate barrier layer; and a corrosion resistant alumina/aluminate sealant for the outer barrier layer. A process is also provided for forming a corrosion resistant alumina/aluminate sealant layer over the outer barrier layer of the EBC. Also provided is an alternative process for treating a porous outer barrier layer with a liquid composition comprising an corrosion resistant alumina/aluminate sealant precursor to infiltrate the porous outer barrier layer with the alumina/aluminate sealant precursor in an amount sufficient to provide, when converted to the corrosion resistant alumina/aluminate sealant, protection of the environmental barrier coating against environmental attack; and converting the infiltrated alumina/aluminate sealant precursor within the porous outer barrier layer to the corrosion resistant alumina/aluminate sealant.

    摘要翻译: 一种制品,其包含含硅基材,覆盖所述基材的环境屏障涂层(EBC),其中所述EBC包含外部碱土金属硅铝酸盐屏障层; 和用于外部阻挡层的耐腐蚀氧化铝/铝酸盐密封剂。 还提供了用于在EBC的外阻挡层上形成耐腐蚀氧化铝/铝酸盐密封剂层的方法。 还提供了一种用包含耐腐蚀氧化铝/铝酸盐密封剂前体的液体组合物处理多孔外部阻隔层的替代方法,该氧化铝/铝酸盐密封剂前体用氧化铝/铝酸盐密封剂前体渗入多孔外部阻隔层,其量足以提供 耐腐蚀氧化铝/铝酸盐密封剂,保护环境防护涂层免受环境攻击; 并将渗透的多孔外阻挡层中的氧化铝/铝酸盐密封剂前体转化成耐腐蚀氧化铝/铝酸盐密封剂。

    Corrosion resistant sealant for outer EBL of silicon-containing substrate and processes for preparing same
    35.
    发明申请
    Corrosion resistant sealant for outer EBL of silicon-containing substrate and processes for preparing same 审中-公开
    含硅基材外层EBL用耐腐蚀密封剂及其制备方法

    公开(公告)号:US20060280954A1

    公开(公告)日:2006-12-14

    申请号:US11150099

    申请日:2005-06-13

    摘要: An article comprising a silicon-containing substrate, an environmental barrier coating (EBC) overlying the substrate, wherein the EBC comprises a higher metal silicate-containing outer barrier layer; and a corrosion resistant alumina/aluminate sealant for the higher metal silicate-containing outer barrier layer. A process is also provided for forming a corrosion resistant alumina/aluminate sealant layer over the higher metal silicate-containing outer barrier layer. Also provided is an alternative process for treating a porous higher metal silicate-containing outer barrier layer with a liquid composition comprising an corrosion resistant alumina/aluminate sealant precursor to infiltrate the porous higher metal silicate-containing outer barrier layer with the alumina/aluminate sealant precursor in an amount sufficient to provide, when converted to the corrosion resistant alumina/aluminate sealant, protection of the environmental barrier coating against environmental attack; and converting the infiltrated alumina/aluminate sealant precursor within the porous higher metal silicate-containing outer barrier layer to the corrosion resistant alumina/aluminate sealant.

    摘要翻译: 一种制品,其包含含硅基材,覆盖所述基材的环境阻挡涂层(EBC),其中所述EBC包含较高含金属硅酸盐的外阻挡层; 和用于较高含金属硅酸盐的外阻挡层的耐腐蚀氧化铝/铝酸盐密封剂。 还提供了一种用于在高含金属硅酸盐的外阻挡层上形成耐腐蚀氧化铝/铝酸盐密封剂层的方法。 还提供了一种用含有耐腐蚀氧化铝/铝酸盐密封剂前体的液体组合物来处理含多孔的高含金属硅酸盐的外部阻隔层的替代方法,以用氧化铝/铝酸盐密封剂前体渗透含多孔的高含金属硅酸盐的外部阻隔层 其量足以提供,当转化为耐腐蚀的氧化铝/铝酸盐密封剂时,保护环境屏障涂层免受环境攻击; 并将渗透的含氧化铝/铝酸盐密封剂前体在含多孔高含金属硅酸盐的外阻挡层内转化成耐蚀氧化铝/铝酸盐密封剂。

    Thermal/environmental barrier coating for silicon-comprising materials
    37.
    发明申请
    Thermal/environmental barrier coating for silicon-comprising materials 审中-公开
    含硅材料的热/环境屏障涂层

    公开(公告)号:US20060166019A1

    公开(公告)日:2006-07-27

    申请号:US11040991

    申请日:2005-01-21

    IPC分类号: B32B15/04 B32B15/00

    摘要: An article comprising a substrate formed of a silicon-comprising material, such as an article exposed to the hostile thermal environment of a gas turbine engine. The article further comprises an environmental barrier layer formed by chemical vapor deposition and comprising mullite and alumina, and a top coat comprising alumina, stabilized zirconia or stabilized hafnia, wherein the zirconia or hafnia is stabilized with an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals, and mixtures thereof. The environmental barrier layer is compositionally graded and consists essentially of mullite at an interface of the environmental barrier layer with the substrate, and consists essentially of alumina at an interface of the environmental barrier layer with the top coat, the environmental barrier layer having a decreasing concentration of mullite and an increasing concentration of alumina in a direction away from the substrate. A method for preparing a thermal/environmental barrier coating on a substrate formed of a silicon-comprising material is also disclosed.

    摘要翻译: 一种制品,其包括由含硅材料形成的基底,例如暴露于燃气涡轮发动机的恶劣热环境的制品。 该制品还包括通过化学气相沉积形成并包括莫来石和氧化铝的环境屏障层,以及包含氧化铝,稳定的氧化锆或稳定的铪的面漆,其中所述氧化锆或铪被选自以下的金属的氧化物稳定: 的镁,钙,钪,钇和镧系金属,以及它们的混合物。 环境阻挡层在组成上是梯度的,并且基本上由环氧屏障层与基底的界面处的莫来石组成,并且在环境阻挡层与顶涂层的界面处基本上由氧化铝组成,环境阻挡层具有降低的浓度 的莫来石和在远离基底的方向上增加的氧化铝浓度。 还公开了在由含硅材料形成的基底上制备热/环境屏障涂层的方法。

    METHODS FOR PREPARING THERMAL BARRIER COATINGS WITH HIGH FRACTURE TOUGHNESS INNER LAYER FOR IMPROVED IMPACT RESISTANCE
    40.
    发明申请
    METHODS FOR PREPARING THERMAL BARRIER COATINGS WITH HIGH FRACTURE TOUGHNESS INNER LAYER FOR IMPROVED IMPACT RESISTANCE 审中-公开
    用于制备具有高断裂韧性内层的热障涂层的方法用于改善耐冲击性

    公开(公告)号:US20080187659A1

    公开(公告)日:2008-08-07

    申请号:US11774878

    申请日:2007-07-09

    IPC分类号: C23C16/40 B05D1/36

    摘要: Method for preparing reduced thermal conductivity thermal barrier coating having improved impact resistance for an underlying substrate for high temperature applications. An exemplary method includes depositing a first zirconia-containing ceramic composition having a c/a ratio of about 1.011 to about 1.016 and stabilized in the tetragonal phase by yttria, calcia, ceria, scandia, magnesia, india, lanthana, gadolinia, neodymia, samaria, dysprosia, erbia, ytterbia, europia, praseodymia, and mixtures thereof, and including about 0.3 to about 0.5% by weight lanthana, neodymia, gadolinia, and mixtures thereof The first material forms a high fracture toughness inner layer having a fraction of porosity of about 0.20 or less, and a thickness in the range of from about 0.5 to about 2 mils. The method includes depositing a ceramic material forming an outer thermal insulating layer overlying the inner layer and having a greater fraction of porosity than the inner layer.

    摘要翻译: 制备降低热导率热障涂层的方法,对于高温应用的底层基材具有改善的耐冲击性。 一种示例性方法包括沉积具有约1.011至约1.016的ac / a比的第一含氧化锆的陶瓷组合物,并通过氧化钇,氧化钙,二氧化铈,氧化钪,印度,氧化镧,氧化钆,氧化钕,钐, 恶臭,er虫,bia虫,欧罗巴,糠ia和它们的混合物,并且包括约0.3至约0.5%重量的镧,钕,氧化钆及其混合物。第一种材料形成具有大约孔隙率分数的高断裂韧性内层 0.20或更小,厚度范围为约0.5至2密耳。 该方法包括沉积形成覆盖内层的外部绝热层并且具有比内层更大的孔隙率的陶瓷材料。