Papers – Page 79 – TechConnect Briefs

Nano-diamond Coatings on Aluminum 319 for Improved Tribological Properties

Blum R., Kalyanasundaram D., Nair R., Molian P., Iowa State University, US

Laser-induced phase transition and sintering of nano-diamond powders (4-8nm) was used to produce a thick (10-50um) strongly adherent nano-diamond/diamond-like carbon (nD-DLC) coatings on aluminum alloy 319. A transition to diamond-like carbon produced a Vickers hardness [...]

Effects of _-Stabilized Alloying Element on the Nanotube Morphology of Ti-Alloy

Jang S.H., Choe H.C., Ko Y.M., Brantley W., Chosun University, KR

In the present study, we chose Nb as a binary alloying element because it has excellent biocompatibility and be expected to act as a -stabilizer. The purities of the starting raw materials were 99.99% for [...]

Electrochemical Characteristics of Nanotube Formed Ti-Zr Alloy

Kim W.G., Choe H.C., Ko Y.M., Brantley W., Chosun University, KR

In this paper, Ti-Zr(10, 20, 30 and 40 wt%) alloys were prepared by arc melting and nano-structure controlled for 24 hr at 1000 °C in argon atmosphere. Formation of oxide nanotubes are conducted by anodizing [...]

Phenomena of Nanotube Formation on the Surface of Cp-Ti, Ti-6Al-4V, and Ti-Ta alloys

Lee K., Choe H.C., Ko Y.M., Brantley W.A., Chosun University, KR

In this study, the phenomena of nanotube formation on the surface of Ti alloys by electrochemical method. Nanotube layer formed on Ti alloys in 1 M H3PO4 and 1 M H2SO4 electrolyte with small additions [...]

Nanotube Formation and Surface Study of New Ternary Titanium Alloys

Choe H.C., Ko Y.M., Brantley W.A., Chosun University, KR

New titanium alloys with improved biocompatibility have been developed for dental and biomedical applications. The osseointegration of implants depends on surface properties of these alloys; nature of the oxide film at the metal-oxide-bone. Also stress [...]

Silane-based water repellent and easy-to-clean surfaces for concrete structure improvement

Kargol M.A., Danish Technological Institute, DK

In addition to its civil engineering properties, concrete also has an architectural and aesthetic function. When the concrete structure ages, the visible appearance of the surface gradually changes as it is exposed to the environment, [...]

A Markedly Cntrollable Adhesion of Superhydrophobic Sponge-like Nanostructure TiO2 Films

Lai Y., Lin C., Huang J., Zhuang H., Sunb L., Nguyen T., Xiamen University, CN

A method consisting of electrochemical anodization and self-assembling of hydrophobic-hydrophilic mixture has been employed to fabricate superhydrophobic sponge-like nanostructured TiO2 surfaces with remarkably controllable adhesion. Water adhesion ranged from ultra-low (5.0 N) to very high [...]

Hypertransparent Nanostructured Superhydrophobic Self-Cleaning Coatings on Glass Substrates

Jiang Y.D., Smalley Y., Paris H., Hunt A.T., nGimat Co., US

Self-cleaning surfaces have wide applications in architectural and automotive windows and solar panels, etc. The development of superhydrophobic surfaces was inspired by observation of lotus and other plant leaves. Many existing hydrophobic coatings either have [...]

Engineering superhydrophobic and superoleophobic surfaces

Tuteja A., Choi W., Mabry J.M., McKinley G.H., Cohen R.E., Massachusetts Institute of Technology, US

The combination of surface chemistry and roughness on multiple scales imbues enhanced repellency to the lotus leaf surface when in contact with a high surface tension liquid such as water. This understanding has led to [...]

Nanostructured thin layers of vanadium oxides doped with cobalt, prepared by pulsed laser ablation: structure, chemistry, morphology, and magnetism

Teodorescu C.-M., Socol G., Negrila C., Luca D., Macovei D., National Institute of Materials Physics, RO

The present study deals with cobalt-doped vanadium oxide thin layers prepared by pulsed laser ablation. Variation of the preparation parameters allows one to synthesize films with a variety of properties. The chemical composition of the [...]