hardness – TechConnect Briefs

Novel Low-energy Super hydrophilic Alloy Coatings

Hou F., Mardon I., Yang Z., Goode C., Cirrus Materials Science Ltd., NZ

Cirrus technology offers a low-voltage, non-toxic PEO super hydrophilic coating technology for application to light alloys. The novel surface finishing technology provides thin, adherent, and durable protection for alloys at low cost with an exceptionally [...]

Structure and Mechanical Properties of Cr(Al)N/Al2O3 Nanocomposite Hard Coatings Fabricated by Differential Pumping Cosputtering

Kawasaaki M., Onishi I., Matsuda K., Nose M., Shiojiri M., JEOL USA Inc., US

Analytical electron microscopy revealed the structure of Cr(Al)N/Al2O3 nanocomposite coatings prepared on the Si substrate rotated at a speed as high as 12 rpm in a differential pumping cosputtering system(DPCS). The main layer that sputter-deposited [...]

Microstructure and tribological properties of CrTiAlN nanoscale composite coatings on 65Mn steels deposited by multi arc ion plating technology

Cai Z., Zhang P., Academy of Armored Force Engineering, CN

In order to improve the life of piston rings, a multicomponent CrTiAlN composite coatings with different chemical composition are deposited on the surface of 65Mn steels by multi-ion plating technology in a gas mixture of [...]

Application of nanoindentation for constituent phases testing

Hussainova I., Jasiuk I., Tallinn University of Technology, EE

Development of advanced composites requires a detailed knowledge of their constituents’ properties as they are often somewhat different from the materials at their bulk form. In the present study, the nanoindentation techniques of two different [...]

Nanomechanical characterization of UV curable hyperbranched polymers

Kim J., Chen Z., Chisholm B., Patel S., North Dakota State University, US

Hyperbranched polymers were explored to develop UV-curable, protective coatings for aluminum 2024-T3 and their viscoelastic and mechanical properties were characterized using nanoindentation techniques. The coating system consists of a hyperbranched polyester acrylate (CN2300, Sartomer Inc), [...]

Carbon nanostructures grown with electron and ion beam methods

Lemoine P., Roy S.S., Maguire P.D., McLaughlin J.A.D., University of Ulster, UK

Simultaneous deposition and patterning of carbon nanostructures can be performed using focused electron beams or ion beams. Although a variety of useful tri-dimensional structures have been prepared (single electron transistor, nanotools, AFM probes, etc.), the [...]

Microwave Irradiation an Alternative Source for Conventional Annealing: A Study of Aluminum Oxide Thin Films by Sol-Gel Process

Phani A.R., Santucci S., University of L'Aquila, IT

Thin films of Al2O3 have been prepared by simple sol-gel process on to quartz substrates, and the as deposited films are subjected to annealing different temperatures and microwave irradiation at different powers. It is evident [...]

Nanomechanical Properties of Silica Coated Multiwall Carbon Nanotubes – Poly(methyl methacrylate) Composites

Olek M., Kempa K., Jurga S., Giersig M., Caesar - Research Center, DE

Nanomechanical properties of polymer composites, reinforced with silica coated multiwall carbon nanotubes (MWNT), have been studied using the nanoindentation technique. The nanohardness and the Young’s modulus have been found to increase strongly with the increasing [...]

Elasto-plastic Properties of Electroplated and Polycrystalline Nickel using Numerical Modelling of the Nanoindentation Test Coupled with an Inverse Method

Qasmi M., Delobelle P., Richard F., Université de Franche-Comté, FR

The aim of this paper is a wide investigation of the nano scale of the elastoplastic properties of electroplated Nickel, which is extensively used in the LIGA techniques and polycrystalline hardened and annealed Nickel with [...]