Higher Velocity Thermal Spray Processes Produce Better Aircraft Engine Coatings

Document Number: 920947

Date Published: April 1992

Author(s):
Gary Irons - Hobart Tafa Technologies, Inc.

Abstract:
High velocity, oxy-fuel (HVOF) coatings are being used or considered for a number of aircraft engine applications (both OEM and overhaul). In most cases, HVOF coatings offer improved coating quality over previous plasma spray or combustion coatings. The superior coating quality is primarily a result of the higher particle velocities achieved with HVOF guns. HVOF coatings provide the following benefits: higher density (lower porosity); higher hardness; lower oxide content; better wear resistance; higher bond strength; improved corrosion barrier; and smoother as-sprayed surfaces.

The various HVOF guns (JetKote, diamond jet, CDS, TopGun and JP- 5000) are discussed and compared to other thermal spray processes (conventional combustion powder and wire guns, plasma spray and detonation gun). Special attention is given to the JP-5000, which produces particle velocities which are 1000 fps faster than the other HVOF guns. HVOF coating properties are described and illustrated.

File Size: 1563K
Product Status: In Stock

See other papers presented at Airframe Finishing, Maintenance & Repair Conference & Exposition, April 1992, San Diego, CA, USA, Session: Airframe Finishing, Maintenance & Repair Conference & Exposition

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