Modulation of Surface Properties; Surface Treatments for Improved Performance, 1988-1991Project ID: 2375
Modulation of Surface Properties; Surface Treatments for Improved Performance, 1988-1991
Total cost:Not available
EU contribution:Not available
Development of procedures to improve the performance of metallic and ceramic surfaces by modifying their properties. Treatments envisaged are: heat pulses (laser and electron beam), ion implantation low pressure and air plasma spray, plasma sputter coating. Properties to be improved: hardness, wear resistance, friction/corrosion resistance, fatigue life, surface chemical sensitivity.
Progress to end 1990
Loops for aqueous corrosion (up to 300) and high temperature gaseous corrosion have been installed and are working. A system for the determination of wear is under design. The construction is foreseen for the near future.
The existing facilities have been used for a large number of treatments for further investigations. The following ions have been implanted: Y, N, Cr, Ar, He, Xe, Ti, D, Bi, on a variety of substrates. Laser glacing has been performed on stainless steel, aluminium alloys, steel coated with Fe Cr Al Y by plasma sputter, coating films of Al, Cr, Cu, Y, TiN, Ag-Pt and RuO2, have been produced. Low pressure plasma spray has been used for the development and production of corrosion barriers of the type Me Cr Al Y. Coatings for optical absorption as TiC, CrO2 and TiN have been produced.
A study has been started to increase the hardness of AISI 316 by N implantation and appropriate heat treatment. An increase of hardness by a factor 2 has been obtained. The distribution of the N after the different steps has been determined by AUGER microscopy. The microstructure of the resolidified surface layer of stainless steel after different laser treatments is under study. The optimum conditions for the deposition of Me Cr Al Y on stainless steels by LPPS have been determined. Collaboration exists with ENEL and CISE and we participate in the ECAST cooperative actions.
Detailed description of work foreseen in 1991 (expected results)
Study on the relation between different microstructures produced by laser glacing of stainless steel and Al alloy and hardness and fatigue resistance.
Study of the principles of surface alloying by e-beam heating and laser glacing in system Al-Cu.
Development of composite coatings of the type Me Cr Al Y + Al2O3 by LPPS.
Development of a calibrated procedure for ion implantation on insulators.
Improvement of hardness of aluminium alloys by N implantation.
Measurements of high temperature corrosion of special coatings produced by LPPS
Short description of evolution of work in 1992
Extension of surface hardening and surface alloying on new alloy systems.