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Proceedings Papers

Shear Testing for Characterizing the Adhesive and Cohesive Coating Strength Without the Need of Adhesives

St. Siegmann, M. Dvorak, H. Grützner, K. Nassenstein, A. Walter
ITSC 2005, Thermal Spray 2005: Proceedings from the International Thermal Spray Conference, 823-829, May 2–4, 2005,
https://doi.org/10.31399/asm.cp.itsc2005p0823
Abstract
The characterization of the adhesive and cohesive strength of thermally sprayed coatings is often evaluated according to given standardized testing procedures. These tests require the preparation of normally large coupons which have to be fixed together using an appropriate adhesive. Additionally they need time for preparation (e.g. annealing/curing of the adhesive) and require test equipments normally not available at job shops for coating development. One of the largest limitations of these tests is the applicability only for non-porous coatings, and in some cases the limited strength of the adhesive. Within a European CRAFT research project on “standards, measurements and testing”, a new shear test method was developed to characterize the mode and value of failure of thermally sprayed layers in a more reliable and less limited manner. This new shear test does not need any adhesive and yields more intrinsic information on coating quality than conventional tensile tests.
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Proceedings Papers

Wiederverwertung aufbereiteter Schleifschlämme durch thermisches Spritzen (Re-Usage of Upgraded Grinding Muds by Thermal Spraying)

A. Schulz, J. Eckebrecht, M. Weber, H. Grützner
ITSC1999, Thermal Spray 1999: Proceedings from the United Thermal Spray Conference, 111-116, March 17–19, 1999,
https://doi.org/10.31399/asm.cp.itsc1999p0111
Abstract
The waste management and practice of reuse of cooling lubricant containing grinding swarf has become a problem of rising importance due to introduction of the law of recycling economics in October 1996. Grinding swarf is a significant set of arising residual material in the metal working industry (about 250.000 t/a). The recycling of this material on the highest extent was object of researches carried out by a working group at the IWT together with the IFAM, accompanied by the Federal Environmental Agency. Target was the preparation of the solid fraction of grinding swarf for reuse as basic material in processes for powder metallurgy and thermal spraying. The produced materials were investigated for their principle applicability to technological problems. Coatings produced from grinding swarf by atmospheric plasma spraying exhibit high hardness and an increased wear resistance. Remaining difficulties are the supply with base materials of constant quality and the resulting instabilities in the coating process and quality of the coatings. Paper text in German.
View Papertitled, Wiederverwertung aufbereiteter Schleifschlämme durch thermisches Spritzen (Re-Usage of Upgraded Grinding Muds by Thermal Spraying) View PDF for content titled, Wiederverwertung aufbereiteter Schleifschlämme durch thermisches Spritzen (Re-Usage of Upgraded Grinding Muds by Thermal Spraying)