research
NASF/AESF Foundation Research Project #123: Electrochemical Manufacturing for Energy Applications - 12th Quarterly Report
Within this white paper, NASF researchers extended their work on 3D printing porous yttria-stabilized zirconia, focusing on the mechanism of porosity formation, as well as evaluating its mechanical strength and thermal shock resistance.
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NASF/AESF Foundation Research Project #123: Electrochemical Manufacturing for Energy Applications - 11th Quarterly Report
This paper is focused on investigating the new ceramic slurry with different packing density to create porous zirconia at final sintering temperature for different applications.
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AESF Heritage: SUR/FIN 2000 – European Academy of Surface Technology: Copper Microelectrodeposition: The Influence of Different Additives on Growth in Microprofiles
In this work, a pH 3.0, 0.8M copper sulfate electrolyte was used for plating onto both blanket and patterned silicon wafers. This novel electrolyte, proposed by U. Landau, involves a number of beneficial effects with respect to the conventional bath.
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Calculating Applied Media Force During Vibratory Finishing
What appear to be identically set-up vibratory bowls will finish identical loads of parts in varying time cycles. This paper offers a new technique to better predict what the operator will produce, by measuring the force applied to the parts. It is the efficiency of that force which controls the efficiency and speed of the refinement cycle.
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Material Database Enables Coating Thickness Measurement Without Calibration
The database from Coatmaster AG has calibrations of over 400 different RAL colors.
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Qualitative Approach to Pulse Plating
In 1986, the AESF published Theory and Practice of Pulse Plating, edited by Jean Claude Puippe and Frank Leaman, the world’s first textbook on pulse plating. A compendium of chapters written by experts in this then-emerging field, the book quickly became the authoritative text in pulse plating. What follows here is the opening chapter, serving as an introduction to the field. Although the field has grown immensely in the intervening 35 years, the reader will find that the material remains a valuable introduction to those looking to advance the field of pulse plating.
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Enhancing the Corrosion Resistance of Electroless Nickel with TCP
Ronatec and CHEMEON have achieved promising early results for bolstering electroless nickel corrosion resistance through the application of a trivalent chromium pretreatment (TCP) top coat.
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Decorative Trivalent Chromium Deposits Applied by Barrel Electroplating
With the wide acceptance of the benefits of decorative trivalent chromium plating, there is a growing demand to successfully adapt this technology to barrel plating. Traditionally, trivalent chromium deposits were not commercially viable using barrel electroplating. Factors such as barrel design, cathode contact, anode placement and current density must be considered when providing a trivalent chromium barrel electrodeposit. This presentation outlines trivalent deposits applied in a barrel and examines variables in operating and electrolyte compositions.
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Electro-codeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 8th Quarterly Research Report
This NASF-AESF Foundation research project report covers the eighth quarter of project work (October-December 2019) on AESF Foundation Research at Tennessee Tech. The objective of the work is to study and optimize the MCrAlY electro-codeposition process to improve the coating oxidation/corrosion performance. In this quarter, the effects of particle density and shape on codeposition were studied. The results show that the shape of the particles plays an important role.
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Correlation Between Electrochemical Behavior and Neutral Salt Fog Corrosion on TCP Coated AA2024
Differences in open circuit potential, electrochemical impedance spectroscopy and Tafel analysis were observed and quantified between the best- and worst-performing processes.
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