Plasma Enhanced PVD Protective Coatings for Wear and Erosion
Abstract
Plasma enhanced magnetron technology utilizes an externally electron source to generate plasma in addition to conventional DC magnetron plasma. The technology was used to clean ASTM A723 steel surfaces prior to deposition, and to deposit adhesive coatings with improved properties. Ta coatings up to 286 microns were sputter deposited on flat and curved specimens cut from an A723 steel cylinder with 120mm diameter, with and without a sputtered Cr interface layer. It was shown that with enhanced surface cleaning prior to deposition and enhanced deposition with proper residual stress control, dense, adhesive, crack-resistant, pollution-free coatings can be deposited directly on A723 steel. Fractured surface of Ta showed excellent microvoid coalescence with ductile mode of fracture. Adhesion tests including groove test, cyclic pulsed laser heating test, and vented erosion simulator test demonstrated excellent adhesion, good structural and wear and erosion properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2009
- Accession Number
- ADA590204
Entities
People
- A. Welty
- E. Langa
- K. Coulter
- L. Collins
- M. Todaro
- R. Wei
- S. L. Lee
- Scott Smith
Organizations
- United States Army Armament Research, Development and Engineering Center