research
Crack Formation during Electrodeposition and Post-deposition Aging of Thin Film Coatings - 9th & 10th Quarterly Report
This NASF-AESF Foundation research project report covers the ninth and tenth quarters of project work (January-June 2018) on this AESF Foundation Research project at the University of Houston. The work continued towards identifying the effective pulse deposition approach to control and mitigate the stress state of chromium thin films and also involved a comprehensive study of palladium stress evolution during electrodeposition and strategies to mitigate its magnitude.
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Advances in Decorative PVD Chromium Coatings for Polymer Substrates
This article reviews a two-layer, selective coating process which incorporates a specially developed UV-cured paint base coating with a sub-micron thick PVD chromium top coating. It illustrates the coating’s testing protocols of automotive manufacturers and the necessities of controlling the stresses within the coating matrix.
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Electro-codeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 2nd Quarterly Research Report
In this quarter, focus was on planned research on the effect of current density and powder density on CrAlY(Ta) particle incorporation in electro-codeposited Ni-CrAlY(Ta) composite coatings.
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Electro-codeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 1st Quarterly Research Report
This first year of work involves the effect of operating parameters on the CrAlY particle incorporation in the coating.
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Innovative Applications of Electroplating and PVD for New Material Solutions - The 54th William Blum Lecture
The following is Dr. Per Møller’s William Blum Memorial Lecture at SUR/FIN 2018, in Cleveland, Ohio on June 4, 2018, with commentary by NASF Technical Editor James H. Lindsay. It covers a variety of projects involved with surface finishing applications, including sustainable energy. Due to Dr. Møller’s serious illness, he was unable to make the journey to SUR/FIN. In his stead, his longtime professional colleague, Dr. Lars Pleth Nielsen, of the Danish Technological Institute (DTI), presented the lecture.
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III. The Effects of Shields and Baffles on the Distribution of Functional Chromium Electrodeposits
This is the third of three combined papers that received the AESF Gold Medal Award for Best Paper published in Plating & Surface Finishing in 1989. Insulating shields and baffles redirect the flow of current and affect the thickness distribution of chromium and other electrodeposits. Many examples of these useful devices for improving the uniformity of chromium deposits are described.
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II. The Effects of Stopoffs and Thieves on the Distribution of Functional Chromium Electrodeposits
This is the second of three combined papers that received the AESF Gold Medal Award for Best Paper published in Plating & Surface Finishing in 1989. Stop-offs, thieves and guards are used to change the pattern of current flow and improve metal distribution. The effects may be planned or may occur unexpectedly, producing undesirable results.
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I. Rack and Anode Effects on the Distribution of Functional Chromium Electrodeposits
This is the first of three combined papers that received the AESF Gold Medal Award for Best Paper published in Plating & Surface Finishing in 1989. Procedures for improving functional chromium thickness distribution begin with this paper that advocates useful rack designs and anode configurations.
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Acid Copper Technologies for Plating on Plastics
Automotive OEM performance requirements continue to increase which presents increased challenges to the supply chain to provide acceptable parts. This presentation will introduce a new system of acid copper technologies that have been designed to increase performance, widen the process operating window, reduce rejects and ultimately increase production capacity.
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Transition from a Simple Auxiliary Anode to a Fully-developed Conforming Anode System for Plating
This paper demonstrates that the use of an elaborate CAE designed conforming anode system enables plating complex exterior automotive part designs within specification. It will be shown that the increased fixed and variable production costs that are unavoidable when operating an elaborate conforming anode system can be partially earned back by a reduction in metal consumption, and by an increased capacity due to shorter plating times.
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