36 results
Search Results
Now showing 1 - 10 of 36
Publication Metadata only Antibacterial and corrosion resistance properties of anodized aa6061 aluminum alloy(2019-07-01) Nattapon Pornnumpa; Manthana Jariyaboon; Mahidol University© 2019, Chulalongkorn University, Faculty of Fine and Applied Arts. All rights reserved. Anodizing is one of the surface treatments for aluminum and its alloys. It is commonly used to increase corrosion resistance and mechanical properties.... This technique is also applied for decorative purpose. Therefore, anodized aluminum alloys are widely used in many applications such as household structure, cell-phone case, automobile and aircrafts. Anodic aluminum oxide (AAO) structure, which has a porePublication Metadata only Effect of Cu and Co additions on corrosion behavior of NiTi alloys for orthodontic applications(2012-01-01) A. Phukaoluan; A. Khantachawana; S. Dechkunakorn; N. Anuwongnukroh; P. Santiwong; J. Kajornchaiyakul; King Mongkuts University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology CenterThe aim of this study is to investigate effect of Cu and Co additions on corrosion behavior of NiTi shape memory alloys for orthodontic application. Ni 50.649.4 , Ti 49 Ni 46 Cu 5 and Ti 50 Ni 47 Co 3 (at%) alloys were prepared. The specimens were... was measured in order to ensure that there is no significant difference which might affect corrosion resistance. It is seen that by adding Co and Cu into NiTi alloys, the corrosion potential (E corr ) and pitting corrosion potential (E break ) increasePublication Metadata only Assessment of mechanical properties and transformation behavior of locally-made Ni-Ti alloys used in orthodontics(2008-12-01) N. Chiranavanit; A. Khantachawana; N. Anuwongnukroh; S. Dechkunakorn; Mahidol University; King Mongkuts University of Technology ThonburiNi-Ti alloy wires have been widely used in clinical orthodontics because of their properties of superelasticity (SE) and shape memory effect (SME). The purpose of this study was to assess the mechanical properties and phase transformation of 50.7Ni...-49.3 Ti (at%) alloy (NT) and 45.2Ni-49.8Ti-5.0Cu (at%) alloy (NTC), cold-rolled with various percent reductions. To investigate SE and SME, heat-treatment was performed at 400°C and 600°C for 1 h. The specimens were examined using an Energy-DispersivePublication Metadata only Property improvement of TiNi by Cu addition for orthodontics applications(2011-09-23) A. Phukaoluan; A. Khantachawana; P. Kaewtatip; S. Dechkunakorn; N. Anuwongnukroh; P. Santiwong; J. Kajornchaiyakul; King Mongkuts University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology CenterThis study aims to investigate mechanical properties and transformation behavior of TiNiCu shape memory alloys to obtain optimal conditions for utilizing as orthodontic wires. TiNi binary alloys with Ni-content 50.6 at.%, TiNiCu alloys with Cu...-content ranging from 5 to 10 at.%, were prepared. The alloys were melted by electrical arc-melting method and then homogenized at, 800°C for 3600 s. The alloys were subsequently sliced into thin plates (1.5 mm) by EDM wire cutting machine. To evaluateItem Metadata only Experiments on Aluminum Alloy Additive Layer WAAM Lamination Using the Arc Current Reduction Technique(2025-01-01) Greebmalai J.; Warinsiriruk E.; Hsiao C.H.; Wang Y.T.; Greebmalai J.; Mahidol UniversityWelding (GMAW) process. The goal is to build laminated layers using aluminum alloys from the five-thousand series. A novel technique is introduced in this research that employs reduced arc-current during the additive layer progress for aluminum alloys.... The developed WAAM laminated layers are particularly suitable for fabricating or repairing large-scale components such as ship propellers, hull sections, and offshore platform structures. Additionally, the corrosion-resistant properties of aluminum alloys makePublication Metadata only Corrosion resistance of anodized Ti-6Al-4V alloy(2009-01-01) Sirinee Thaiwatthana; Noparat Kanjanaprayut; Kosit Wongpinkeaw; Manthana Jariyaboon; Thailand National Metal and Materials Technology Center; King Mongkut's University of Technology North Bangkok; Mahidol UniversityIn this study, titanium alloy Ti-6Al-4V sheet and rod were anodized at different applied potentials from 10-50V producing a range of colors such as light blue, dark blue, purple, and gold. Anodic polarization and an electrochemical impedance... an environment inside the human's body. The corrosion resistance of anodized Ti-6Al-4V alloy showed a clear improvement but reduced after soaking time was increased. Two layers of oxide films were found on the surface of anodized specimens, consisting of a porousPublication Metadata only Evaluation of anticorrosive behaviour of ZnO nanotetra-pods on a AZ91-grade Mg alloy(2019-10-01) R. Brindha; S. S.Raja Ajith; M. Nandhini; M. Selvam; Kittitat Subannajui; Kittikhun Khotmungkhun; K. Sakthipandi; Sethu Institute of Technology; K.S.Rangasamy College of Technology; Mahidol Universitydiffraction, an ultra violet visible spectrometry and energy-dispersive spectroscopy. The electrochemical corrosion behaviours of an AZ91-grade Mg alloy and a ZnO/PN nanotetra-pod-coated Mg alloy were investigated. The Tafel plot revealed that the corrosionPublication Metadata only Mechanical alloying of Sm and Fe mixtures having the molar ratio of 1/2 and 1/3(2000-01-01) S. Thongmee; I. M. Tang; T. Methasiri; Mahidol University; Chulalongkorn UniversityThe mechanical alloying of Sm-Fe mixtures of molar ratios 1/2 and 1/3 were carried out. The milled mixtures were subjected to a two-step annealing process; first annealing for 1 h at 900 °C in argon gas, followed by a second annealing for 4 hPublication Metadata only Influence of third element of TiNi alloy on tribological behavior in dry and wet conditions for orthodontic applications(2019-01-01) A. Phukaoluan; A. Khantachawana; P. Kaewtatip; S. Dechkunakorn; Mahidol University; King Mongkut s University of Technology Thonburi; Siam Technology College© 2019 Trans Tech Publications Ltd, Switzerland. The tribological behavior of Ti49.4Ni50.6, Ti49Ni46Cu5 and Ti50Ni47Co3 (at%) alloy in dry and wet conditions was studied. The alloy was prepared in a Vacuum Arc Re-melting (VAR), homogenized at 800oPublication Metadata only Effect of the Addition of 3% Co in NiTi Alloy on Loading/Unloading Force(2017-11-29) A. Phukaoluan; S. Dechkunakorn; N. Anuwongnukroh; A. Khantachawana; P. Kaewtathip; J. Kajornchaiyakul; W. Wichai; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Center© 2017 Published under licence by IOP Publishing Ltd. The study evaluated the loading-unloading force in the load-deflection curve of the fabricated NiTiCo and NiTi wires. Wire alloys with Nickel, Titanium, and Cobalt (purity-99.95%) with atomic....08g for NiTiCo and NiTi wire, respectively. The force at each deflection point of NiTiCo in loading-unloading force was higher than NiTi wire. This study concluded that the addition of 3%Co in NiTi alloy can increase the loading-unloading force of Ni