Composite body made of graphite and high-melting metal
May 25, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSelectively modified carbon-carbon composites Process for preparing alkanols from synthesis gas Rotary anode for an X-ray tube and a method for manufacturing the same Composite rotary anode for X-ray tube and process for preparing the composite Composite rotary anode for X-ray tube and process for preparing the composite Composite rotary anode for x-ray tube and process for preparing the composite Methods and compostions involving high specific surface area carbides and nitrides Silicon nitride base ceramic heater element and method of producing same Articles having coatings of fine-grained and/or equiaxed grain structure Patent #: 4920012 InventorsAssigneeApplicationNo. 529113 filed on 05/25/1990US Classes:428/634, Free carbon containing component313/355, Coated or laminated378/144, Rotary428/635, Four or more distinct components with alternate recurrence of each type component428/670Platinum group metal-base componentExaminersPrimary: Dean, R.Assistant: Wyszomierski, George Attorney, Agent or FirmForeign Patent References
International ClassH01J 035/10Foreign Application Priority Data1989-05-26 ATAbstractA composite body for rotary anodes of X-ray tubes is made from graphite, a carbide-forming, high-melting metal component and a multi-layered intermediate layer. The first layer of the intermediate layer closest to the graphite is made up of a metal or an alloy thereof which does not form a carbide. Applied over the first layer are at least two double layers. Each double layer has one individual layer of at least one carbide-forming metal or at least one carbide thereof, and a second individual layer of a metal or an alloy thereof which does not form a carbide. Preferred carbide-forming metals are tungsten, tantalum, hafnium and niobium. Preferred metals which do not form carbides are rhenium and platinum. In a preferred embodiment, the composite body is a rotary anode for X-ray tubes, with a basic body made of graphite and a burning track made of tungsten or a tungsten-rhenium alloy applied directly to the intermediate layer.Other References
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