Maryland's Defense Patent Database

The defense community in Maryland is an R&D powerhouse.

Use this database to see the innovative patents that are poised for commercialization.

Article with enhanced resistance to thermochemical erosion, and method for its manufacture

Patent image
ARL

A body of iron, steel or other such ferrous material is protected from thermochemical erosion by a layer of an iron nitride having a relatively low nitrogen content. The atomic percentage of nitrogen in the iron nitride layer is no greater than 20%, and in specific embodiments is in the range of 10-15%. The nitride layer may have a layer of a refractory material deposited thereatop. Some refractory materials include metals such as chromium. The invention has specific utility for protecting gun barrels, turbines, internal combustion engines, drilling equipment, machine tools, aerospace systems and chemical reactors which are exposed to extreme conditions of temperature and pressure. Specifically disclosed is a gun barrel which incorporates the invention.

Inventors: 
Conroy, Paul J.; Garner, James M.; Leveritt, Charles
Patent Number: 
Technical domain: 
Machines and Processing
FIle Date: 
2004-06-03
Grant Date: 
2010-01-26
Grant time: 
2,063 days
Grant time percentile rank: 
38
Claim count percentile rank: 
9
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US ARMY