The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2018
Filed:
Oct. 22, 2007
Karthik Nagarathnam, Culpepper, VA (US);
Donald Trostle, Herndon, VA (US);
David L. Kruczynski, Amissville, VA (US);
Dennis W. Massey, Markham, VA (US);
Karthik Nagarathnam, Culpepper, VA (US);
Donald Trostle, Herndon, VA (US);
David L. Kruczynski, Amissville, VA (US);
Dennis W. Massey, Markham, VA (US);
Utron Kinetics, LLC, Manassas, VA (US);
Abstract
Near net shape refractory material is made in combustion driven compaction. The gas mixture is combusted, driving a piston or ram into a die containing refractory material powder, compressing the powder into a near net shape. As the chamber is filled with gas, the piston or ram is allowed to rest on the powder, pre-compressing the powder and removing trapped air. During compression, forces reach 150 tsi or more. Loading occurs within several hundred milliseconds. After compression, the shaped refractory part is sintered in a hydrogen environment. This process creates near net shape components with little scrap metal. The apparatus used to perform this process is about the size of a telephone booth and can be moved with a standard forklift. The powder may include a combination of Mo—Re, Re, W—Re, HfC and Hf of a fineness dictated by desired shrinkage, resulting in a material suitable for high-stress, high-temperature applications.