Accession Number:

ADA482156

Title:

Reduce Manufacturing Costs of Ultra-High Temperature Rhenium Pintle/Throat Combinations

Descriptive Note:

Technical rept. 18 Sep 2005-28 Jun 2006

Corporate Author:

NATIONAL CENTER FOR DEFENSE MANUFACTURING AND MACHINING LATROBE PA

Personal Author(s):

Report Date:

2006-06-28

Pagination or Media Count:

2.0

Abstract:

Controllable thrust propulsion for the next generation of tactical missiles NLOS PAM is providing significant mission flexibility and increasing the systems capability in terms of precision performance. Thrust propulsion within a tactical missile is controlled by a pintlethroat configuration. The purpose of the pintlethroat configuration is to maximize the thrust within the rocket motor to successfully propel the missile. Rhenium, due to its high thermal and mechanical properties, is the best acceptable high-temperature and corrosion resistant material for managed-energy tactical propulsion systems. The NCDMM, along with Plasma Processes, Inc. PPI, and the Aviation and Missile Research, Development, and Engineering Center AMRDEC, have been requested to optimize the manufacturing process to reduce the cost of the pintlethroat combinations. This will be accomplished by replacing solid rhenium with rhenium coatings fabricated by Plasma Processes El-Form electrodeposition process. In a previous effort, PPI had successfully machined the pintles and throats from lightweight graphite substrates. Utilizing their El-Form rhenium deposition process, PPI successfully coated these graphite pintles and throats with a rhenium coating in several thicknesses for testing. During previous Hot Fire testing several iterations of boost and sustain cycles of the pintlethroat combinations, a minimum thickness of rhenium coating for the throat was established. However, a minimum thickness of rhenium coating for the pintle was not. The NCDMM, PPI, and AMRDEC were successful in optimizing the processes to achieve the goal of producing lightweight rhenium coated pintlethroat combinations with a 90 reduction in costs.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Couplers, Fasteners and Joints
  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE