Alloys with higher silicon concentrations can inhibit the growth of anodic oxide films under galvanostatic and potentiostatic conditions.
The Vickers indenter hardness test, based on indenter displacement under test load (universal hardness), is being used for an increasing number of applications. The new method is also subject to much discussion among the experts. An important question is the relationship or the degree of correlation between the new universal hardness test and the classic Vickers hardness test.
Evaluation of a Simple Thin-Film Ductility Tester and Review of the Ductility of Nickel Sulfamate Deposits
Originally published in 1992, this paper addressed a critical issue in the science of electroforming, that of the measurement and control of deposit ductility.
Electrocodeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 5th Quarterly Research Report
The objective of the work is to study and optimize the MCrAlY electrocodeposition process to improve the coating oxidation/corrosion performance. In this quarter, work focused on preparation and characterization of CrAlY-based alloy powders for the planned research activities in Task 2: The Effect of CrAlY Particle size on CrAlY Particle Incorporation.
The incident of nickel corrosion in ENEPIG multilayers (electroless nickel, electroless palladium and immersion gold) was brought to light after it was observed during the analysis of gold wire bond lifts.
Numerous metals are subjected to anodic oxidation. As a result, one can obtain amorphous barrier-type oxides, crystalline barrier-type oxides or amorphous nanoporous oxides. This paper provides details of sensing techniques and recent advances in the development of NAA-based sensing and biosensing technologies.
Electro-codeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 4th Quarterly Research Report
This NASF-AESF Foundation research project report covers the fourth quarter of project work (October-December 2018) on this AESF Foundation Research project at the Tennessee Technological University.
Cyanide in mining and industrial wastewaters has been around from the beginning, including electroplating processes. This presentation reviews a number of current processes, and in particular, offers new technologies for improvement in cyanide destruction by the most common process, using sodium hypochlorite.
#research #pollutioncontrol #surfin
This paper describes a low cost alternative coating technology for light metals that electrodeposits an engineered thin-film coating which bonds tightly to the substrate and provides excellent corrosion and wear resistance along with superior electrical and thermal performance. As a new process, this technology offers a stable, low-cost option to manufacturers and applicators seeking to improve and extend their use of light metal substrates.
This paper presents recent industry specific hard chromium technology advancements such as meeting the needs of the automotive and hydraulic industries. Examples for additional improvement potential are shown to simplify the operation and make hard chromium plating even more reliable in its specific needs for a wide range of industries served.
#research #automotive #surfin
Electro-codeposition of MCrAlY Coatings for Advanced Gas Turbine Applications - 3rd Quarterly Research Report
This NASF-AESF Foundation research project report covers the third quarter of project work (July-September 2018) on this AESF Foundation Research project at the Tennessee Technological University. 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, studies continued on the effect of current density on CrAlY particle incorporation in electro-codeposited Ni-CrAlY composite coatings, focusing on the current density range of 20 to 60 mA/cm2.
The plating on plastics (POP) market has evolved to include an ever-broader range of substrates, huge increases in selective plating demand, using tools such as two-shot molding and laser ablation.
#research #economics #surfin
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.
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.
#research #vacuum-vapor #automotive
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.
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.
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.
#research #energy #surfin
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.