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    • 93. 发明申请
    • Rare earth-based core constructions for casting refractory metal composites, and related processes
    • 用于铸造难熔金属复合材料的稀土基核心结构及相关工艺
    • US20080078520A1
    • 2008-04-03
    • US11540737
    • 2006-09-29
    • Bernard Patrick BewlayFrederic Joseph Klug
    • Bernard Patrick BewlayFrederic Joseph Klug
    • B22C9/10
    • B22C9/10B22C1/02B22C9/04B22C9/12
    • A method of fabricating a core for a ceramic shell mold is disclosed. A porous core body is formed from at least about 50% by weight of at least one rare earth metal oxide. The core body is heated under heating conditions sufficient to provide the core with a density of about 35% to about 80% of its theoretical density. The core body is then infiltrated with a liquid colloid or solution of at least one metal oxide compound, e.g., rare earth metal oxides; silica, aluminum oxide, transition metal oxides, and combinations thereof. The infiltrated core body is then heated to sinter the particles without substantially changing the dimensions of the core body. Mold-core assemblies which include such a core body are also described. A description of processes for casting a turbine component, using the core, is also set forth herein.
    • 公开了一种制造用于陶瓷壳模的芯的方法。 多孔芯体由至少约50重量%的至少一种稀土金属氧化物形成。 芯体在足以提供核心的密度为其理论密度的约35%至约80%的加热条件下加热。 然后将芯体用至少一种金属氧化物化合物例如稀土金属氧化物的液体胶体或溶液渗透; 二氧化硅,氧化铝,过渡金属氧化物及其组合。 然后将渗透的芯体加热以烧结颗粒,而基本上不改变芯体的尺寸。 还描述了包括这种芯体的模芯组件。 本文还阐述了使用该芯铸造涡轮机部件的方法。
    • 95. 发明授权
    • Niobium-silicide based composities resistant to high temperature oxidation
    • 铌硅基复合材料耐高温氧化
    • US06913655B2
    • 2005-07-05
    • US10263527
    • 2002-10-03
    • Melvin Robert JacksonBernard Patrick BewlayJi-Cheng Zhao
    • Melvin Robert JacksonBernard Patrick BewlayJi-Cheng Zhao
    • C22C27/02C22C29/18F01D5/28
    • C22C29/18C22C27/02F01D5/28F05D2200/11Y02T50/672
    • A niobium-silicide refractory metal intermetallic composite adapted for use in a turbine component. The niobium-silicide refractory metal intermetallic composite comprises: between about 19 atomic percent and about 24 atomic percent titanium; between about 1 atomic percent and about 5 atomic percent hafnium; between about 16 atomic percent and about 22 atomic percent silicon; between about 7 atomic percent and about 14 atomic percent chromium; from about 1.5 atomic percent to about 3 atomic percent tin; and a balance of niobium. The niobium silicide refractory intermetallic composite contains a tetragonal phase, which comprises a volume fraction from 0.35 to 0.5 of the niobium silicide refractory intermetallic composite, and a hexagonal M3Si5 silicide phase (wherein M is at least one of Nb and Hf) which comprises a volume fraction comprises less than 0.25 of the niobium silicide refractory intermetallic composite. A ratio of the sum of atomic percentages of niobium and tantalum present in said niobium silicide refractory intermetallic composite to the sum of atomic percentages of titanium and of hafnium present in said niobium silicide refractory intermetallic composite has a value from 1.5 to 2.0.
    • 适用于涡轮机部件的铌硅化物耐火金属金属间复合材料。 所述铌 - 硅化物难熔金属金属间复合物包括:约19原子%至约24原子%的钛; 约1原子%至约5原子%的铪; 介于约16原子%和约22原子%之间的硅; 约7原子%至约14原子%的铬; 从约1.5原子%至约3原子%的锡; 和铌的平衡。 所述铌硅化物难熔金属间复合材料包含四方相,其包含硅化铌耐火金属间复合材料的0.35至0.5的体积分数和六方晶系的N 3 Si 5 Si 5 Si 包括体积分数的相(其中M是Nb和Hf中的至少一种)包括小于0.25的硅化铌耐火金属间复合材料。 所述铌硅化物难熔金属间化合物中存在的铌和钽的原子百分比之和与存在于所述铌硅化物耐火金属间复合材料中的钛和铪的原子百分比之和的比值为1.5至2.0。
    • 97. 发明授权
    • Filament design, method, and support structure
    • 灯丝设计,方法和支撑结构
    • US06464551B1
    • 2002-10-15
    • US09583404
    • 2000-05-31
    • Don Mark LipkinCarl Edward EriksonBernard Patrick BewlayDennis Joseph Dalpe
    • Don Mark LipkinCarl Edward EriksonBernard Patrick BewlayDennis Joseph Dalpe
    • H01J904
    • H01K7/02H01J1/18H01J9/04H01K1/14
    • A filament comprises a generally thin metal component, such as a sheet, ribbon, or foil. The filament comprises at least one emitter, at least one current-condensing structure and a tab on each end of the at least one emitter. Each tab is connectable to a support system, comprising for example a lead and attachment post. When a current is passed through the filament, the current-condensing structure establishes current flow through the filament resulting in a desired temperature distribution across the emitter, for example a substantially uniform temperature distribution. A predictive tool for determining a geometry of a filament to provide a desired temperature distribution is set forth. The filament may be curved, and methods and systems for providing a curved filament are also provided. Attachment systems are further disclosed for attaching an emitter to a support structure.
    • 长丝包括通常薄的金属部件,例如片,带或箔。 灯丝包括至少一个发射器,至少一个电流冷凝结构和至少一个发射器的每个端部上的突出部。 每个标签可连接到支撑系统,包括例如引线和附接柱。 当电流通过灯丝时,电流冷凝结构建立通过灯丝的电流,导致跨过发射器的所需温度分布,例如基本均匀的温度分布。 阐述了用于确定细丝几何形状以提供所需温度分布的预测工具。 丝可以是弯曲的,并且还提供了用于提供弯曲细丝的方法和系统。 进一步公开了用于将发射器附接到支撑结构的附接系统。
    • 98. 发明授权
    • Niobium-silicide based composites resistant to low temperature pesting
    • 铌 - 硅化物基复合材料耐低温虫害
    • US06419765B1
    • 2002-07-16
    • US09735769
    • 2000-12-13
    • Melvin Robert JacksonBernard Patrick BewlayJi-Cheng Zhao
    • Melvin Robert JacksonBernard Patrick BewlayJi-Cheng Zhao
    • C22C2702
    • C22F1/18C22C27/02
    • A niobium-silicide refractory metal intermetallic composite having enhanced material characteristics, such as oxidation resistance, creep resistance, and toughness, and turbine components made therefrom. The composite comprises between about 14 atomic percent and about 26 atomic percent titanium; between about 1 atomic percent and about 4 atomic percent hafnium; up to about 6 atomic percent tantalum; between about 12 atomic percent and about 22 atomic percent silicon; up to about 5 atomic percent germanium; up to about 4 atomic percent boron; between about 7 atomic percent and about 14 atomic percent chromium; up to about 3 atomic percent iron; up to about 2 atomic percent aluminum; between about 1 atomic percent and about 3 atomic percent tin; up to about 2 atomic percent tungsten; up to about 2 atomic percent molybdenum; and a balance of niobium, wherein a ratio of a sum of atomic percentages of niobium and tantalum present in said niobium silicide refractory intermetallic composite to a sum of atomic percentages of titanium and hafnium present in said niobium silicide refractory intermetallic composite has a value between about 1.4 and about 2.2 (i.e.,1.4
    • 具有提高材料特性如耐氧化性,抗蠕变性和韧性的铌 - 硅化物耐火金属金属间复合物和由其制成的涡轮部件。 复合材料包含约14原子%至约26原子%的钛; 约1原子%至约4原子%的铪; 高达约6原子%的钽; 约12原子%和约22原子%之间的硅; 高达约5原子%的锗; 高达约4原子%的硼; 约7原子%至约14原子%的铬; 高达约3原子%铁; 高达约2原子%的铝; 在约1原子%和约3原子%之间的锡; 高达约2原子%的钨; 高达约2原子%的钼; 和铌的余量,其中存在于所述铌硅化物难熔金属间复合材料中的铌和钽的原子百分比之和与存在于所述铌硅化物耐火金属间复合材料中的钛和铪的原子百分比之和的比值在约 1.4和约2.2(即1.4 <(Nb + Ta):Ti + Hf)<2.2)。