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Publication Open Access The potential of copper alloy as alternative material for post and core applications.(2014-09) Somchai Urapepon; สมชาย อุรพีพล; Usanee Peungpaiboon; อุษณีย์ ปึงไพบูลย์; Somchai Urapepon; สมชาย อุรพีพล; Mahidol University. Faculty of Dentistry. Department of ProsthodonticsObjective: The purpose of this study was to investigate the use of copper alloy for dental application. Materials and methods: Three types of copper alloy used in Thailand were selected (Cu-Al, Cu-Al-Ni and Cu-Zn). Ingots of these three alloys... were prepared. The tensile test and potentiodynamic polarization for corrosion test were performed following ISO 1562: 2004 Dentistry-Casting gold alloys and ISO 10271: 2001 Dental metallic materials-Corrosion test method. The ultimate strength, 0Publication Metadata only Properties of experimental copper-aluminiumnickel alloys for dental post-and-core applications(2014-01-01) Apiwat Rittapai; Somchai Urapepon; Julathep Kajornchaiyakul; Choltacha Harniratisai; Mahidol University; National Metal and Materials Technology Center (MTEC)PURPOSE: This study aimed to develop a copper-aluminium-nickel alloy which has properties comparable to that of dental alloys used for dental post and core applications with the reasonable cost. MATERIALS AND METHODS: Sixteen groups of experimental... copper alloys with variants of 3, 6, 9, 12 wt% Al and 0, 2, 4, 6 wt% Ni were prepared and casted. Their properties were tested and evaluated. The data of thermal, physical, and mechanical properties were analyzed using the two-way ANOVA and Tukey's testPublication Metadata only Shear bond strength between autopolymerizing acrylic resin and Co-Cr alloy using different primers(2012-10-30) Sasiwimol Sanohkan; Somchai Urapepon; Choltacha Harnirattisai; Chakrit Sirisinha; Panya Sunintaboon; Mahidol UniversityThis study aimed to examine the shear bond strength between cobalt chromium alloy and autopolymerizing acrylic resin using experimental primers containing 5, 10, and 15 wt% of 4-methacryloxyethyl trimellitic anhydride or 1, 2, and 3 wt% of 3...-methacryloxypropyl-trimethoxysilane comparison to 5 commercial primers (ML primers, Alloy primer, Metal/Zirconia primer, Monobond S, and Monobond plus). Sixty alloy specimens were sandblasted and treated with each primer before bonded with an acrylic resinPublication Metadata only Development of Metal-resin Composite Restorative Material Part 4 Flexural Strength and Flexural Modulus of Metal-resin Composite using Ag-In Alloy Particles as Filler(2002-01-01) Kiyoshi Kakuta; Somchai Urapepon; Yukio Miyagawa; Hideo Ogura; Masahiko Yamanaka; Chatcharee Suchatlampong; Apiwat Rittapai; Nippon Dental University; Mahidol UniversityThe flexural strength and flexural modulus of an experimental metal-resin composite, which used Ag-In alloy particle as the filler, were evaluated. The effect of acid treatment and heat treatment on the Ag-In alloy particle was investigated... of HCl of the acid treatment. A metal-resin composite, which used acid-treated and 350°C heat-treated Ag-In alloy fillers, matched the requirement of strength of ISO 4049. The average of flexural modulus of the experimental metal-resin composite was 9Publication Metadata only Electrochemical corrosion of titanium and titanium-based alloys(2001-01-01) Chotiros Kuphasuk; Yoshiki Oshida; Carl J. Andres; Suteera T. Hovijitra; Martin T. Barco; David T. Brown; Indiana University-Purdue University Indianapolis; Mahidol University; Indiana University School of DentistryStatement of problem. Two varieties of unalloyed titanium, Ti-6Al-4V and NiTi, commonly are used in medical and dental fields. Several other types of alloys for potential use in these fields have been developed, including Ti-4.5Al-3V-2Mo-2Fe... and vanadium-free alloys (Ti-5Al-2.5Fe and Ti-5Al-3Mo-4Zr). The corrosion of these alloys under simulated physiologic conditions is not known. Purpose. This study compared the corrosion behaviors of 6 titanium materials through electrochemical polarizationPublication Metadata only Improvement of mechanical and biological properties of TiNi alloys by addition of Cu and Co to orthodontic archwires(2016-01-01) Aphinan Phukaoluan; Anak Khantachawana; Pongpan Kaewtatip; Surachai Dechkunakorn; Julathep Kajornchaiyakul; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Center© 2016 CEO The purpose of this study was to investigate improved performances of TiNi in order to promote tooth movement. Special attention was paid to the effect on the clinical properties of TiNi of adding Cu and Co to this alloy. Ti49.4Ni50.6, Ti...49Ni46Cu5and Ti50Ni47Co3(at %) alloys were prepared. Specimens were cold-rolled at 30% reduction and heat-treated at 400 °C for 60 min. Then, the test results were compared with two types of commercial archwires. The findings showedPublication 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 On the bimodality of the hyperfine field distribution in amorphous Fe32Ni36Cr14P12B6 alloy(1985-01-01) I. M. Tang; Mahidol UniversityThe bimodality of the hyperfine field distribution in amorphous Fe32Ni36Cr14P12B6alloy reported by Chien et al. (Phys. Rev. B19 (1979) 81) is shown to be the result of the bimodality in the distribution of the values of the strengths of the bonds... within the alloy. The bimodality in the distribution of the bond strength values arises from the presence of two types of dense random packed cells (one rich in Cr atoms and the other deficient in Cr) in the alloy. © 1985.Publication 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-Dispersive