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Publication 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 Comparison of friction forces between stainless orthodontic steel brackets and TiNi wires in wet and dry conditions(2017-03-01) Aphinan Phukaoluan; Anak Khantachawana; Pongpan Kaewtatip; Surachai Dechkunakorn; Niwat Anuwongnukroh; Peerapong Santiwong; Julathep Kajornchaiyakul; King Mongkut s University of Technology Thonburi; Mahidol University; Thailand National Metal and Materials Technology Centerthe frictional forces between a stainless steel bracket and five different wire alloys under dry and wet (artificial saliva) conditions. TiNi, TiNiCu, TiNiCo, commercial wires A and commercial wires B with equal dimensions of 0.016 × 0.022′′ were tested... roughness testing. Static and kinetic friction forces were measured using a custom-designed apparatus, with a 3-mm stretch of wire alloy at a crosshead speed of 1 mm/min. The static and dynamic frictions in the wet condition tended to decrease more slowly