Improvement of mechanical and biological properties of TiNi alloys by addition of Cu and Co to orthodontic archwires

Phukaoluan, Aphinan; Khantachawana, Anak; Kaewtatip, Pongpan; Dechkunakorn, Surachai; Kajornchaiyakul, Julathep

doi:10.1016/j.ortho.2016.07.015

Cited by 5 publications

(3 citation statements)

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“…The addition of Au enhances while Ce decreases the transformation temperature [14,15]. Increases in recoverable strain, and residual strain and decreases corrosion resistance by the addition of Co, in TiNi alloys [16][17][18][19][20]. TiNiCu alloys have a two-way shape memory effect, corrosion resistance, antibacterial effect, damping capacity, and shape-memory recovery, and yield strength becomes high by adding Cu in TiNi alloys [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Ahmad

2023

JMNM

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Shape memory alloys (SMAs) are a type of smart material and have excellent engineering and medical applications. TiNi binary alloys possess remarkable shape recovery, mechanical properties, corrosion resistance, and excellent biocompatibility. By ternary elements addition just like Au, Pt, Pd, Hf, and Zr, increases transformation temperatures, leading to high-temperature shape memory alloys (more than 100°C) but other elements (Fe, Cu, Co, and Mo) form low-temperature shape memory alloys, (lower than 100°C). In the present work, it is reported that the effect of ternary element addition on microstructural properties, shape memory properties, mechanical properties, corrosion resistance, and biocompatibility of ternary shape memory alloys. Ag, Au, and Cu-based TiNi ternary alloys have excellent biocompatibility. The addition of ternary elements such as Ag and Nb increases corrosion resistance, Fe rises the hysteresis loop, Hf enhances thermal stability, and Mo raises workability.

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Section: Introductionmentioning

confidence: 99%

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Ahmad

2023

JMNM

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“…A cosputtered Ni–Ti–Co thin film library is investigated for SME through the evaluation of the phase transformation. First reported in 1975, the Ni–Ti–Co alloy has since found wide applications: as a component of permanent magnets, − high-entropy alloys, , shape memory alloys, and superalloys , along with substantive use in biomedical applications. − The addition of Co to NiTi has been shown to reduce the M s and A s temperatures in combination with the Ni content; it has also been shown to increase yield strength. , These improvements are sought out in elastocaloric cooling technology where ambient transition temperatures and small thermal hysteresis are desired . Until now, investigations on the structural phases, mechanical properties, elastic properties, and phase transformation behavior that have been reported for Ni–Ti–Co involved one-by-one bulk preparation that covered a limited composition space, with addition of Co investigated only up to 10 at.…”

Section: Introductionmentioning

confidence: 99%

Combinatorial Exploration and Mapping of Phase Transformation in a Ni–Ti–Co Thin Film Library

et al. 2020

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Combinatorial synthesis and high-throughput characterization of a Ni− Ti−Co thin film materials library are reported for exploration of reversible martensitic transformation. The library was prepared by magnetron co-sputtering, annealed in vacuum at 500 °C without atmospheric exposure, and evaluated for shape memory behavior as an indicator of transformation. Composition, structure, and transformation behavior of the 177 pads in the library were characterized using high-throughput wavelength dispersive spectroscopy (WDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and four-point probe temperature-dependent resistance (R(T)) measurements. A new, expanded composition space having phase transformation with low thermal hysteresis and Co > 10 at. % is found. Unsupervised machine learning methods of hierarchical clustering were employed to streamline data processing of the large XRD and XPS data sets. Through cluster analysis of XRD data, we identified and mapped the constituent structural phases. Composition−structure− property maps for the ternary system are made to correlate the functional properties to the local microstructure and composition of the Ni−Ti−Co thin film library.

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“…Technological innovations in terms of orthodontic wires should not give precedence to their esthetic advantages 26 to the detriment of their biological 27 and mechanical functions 28 . All orthodontic treatment must be for the purpose of correcting malocclusion and obtaining a stable occlusion without causing damage to tissues 29 .…”

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confidence: 99%

Mechanical properties of orthodontic wires on ceramic brackets associated with low friction ligatures

Koike

Mikami

Lacerda‐Santos

et al. 2017

Rev. odontol. UNESP

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ResumoIntrodução: Poucos estudos investigaram as propriedades mecânicas dos fios ortodônticos em bráquetes cerâmicos associados às ligaduras. Objetivo: O objetivo deste estudo foi comparar a carga-deflexão de fios ortodônticos com seção redonda de 0,016" de aço inoxidável (AI), níquel-titânio (NiTi) e composto de polímero reforçado com fibra de vidro (CPRFV). Material e método: Sessenta espécimes obtidos a partir de 10 arcos pré-contornos seccionados (TP Orthodontics), foram divididos em 3 grupos de 20 de acordo com cada tipo de material (1 fio estético e 2 não estético) e comprimento de 50 mm. A metodologia consistiu de um teste de flexão de 3 pontos usando bráquetes estéticos cerâmicos (INVU, TP Orthodontics, Edgewise, 0,022 "x 0,025") como pontos de suporte. Os ensaios de tração foram realizados em uma máquina de ensaios mecânicos, a uma velocidade de 10 mm / min, deflexão de 1 mm, 2 mm e 3 mm. Utilizou-se o teste não-paramétrico de comparações múltiplas de Friedman (P <0,05). Resultado: O fio de níquel-titânio apresentou menor carga / deflexão em relação ao aço inoxidável. Os fios CPRFV tiveram valores de resistência mais baixos entre todos os grupos avaliados (P <0,05). O fio de aço mostrou deformação permanente após deflexão de 3 mm, fio NiTi demonstrou efeito de memória e o tipo estético teve fraturas com perda de força. Conclusão: Pode-se concluir que os fios de aço têm valores de resistência elevados, exigindo a incorporação de alças e dobras para reduzir a carga / deflexão. Os fios NiTi e CPRFV produziram baixos níveis de força, porém o fio estético mostrou-se fraturado e quebrado. Descritores: Fios ortodônticos; elastômeros; materiais odontológicos. AbstractIntroduction: Few studies investigated the mechanical properties of orthodontic wires on ceramic brackets associated the ligatures. Objective: This study aimed to compare the load-deflection of orthodontic wires with round section of 0.016" made of stainless steel (SS), nickel-titanium (NiTi) and glass fiber-reinforced polymer composite (GFRPC). Material and method: Sixty specimens obtained from 10 sectioned pre-contoured arches (TP Orthodontics), were divided into 3 groups of 20 according to each type of material (1 esthetic-type wire and 2 not esthetic) and length of 50 mm. The methodology consisted of a 3-point bending test using esthetic ceramic brackets (INVU, TP Orthodontics, Edgewise, 0.022"x 0.025") as points of support. The tensile tests were performed on a mechanical test machine, at a speed of 10 mm/min, deflection of 1 mm, 2 mm and 3 mm. Friedman's Non Parametric Multiple comparisons test was used (P<0.05). Result: The nickel-titanium wire presented smaller load/ deflection compared with stainless steel. GFRPC wires had lower strength values among all groups evaluated (P<.05). The steel wire showed permanent deformation after 3 mm deflection, NiTi wire demonstrated memory effect and the esthetic type had fractures with loss of strength. Conclusion: It can be concluded that steel wires have high strength values, requiring the incorporati...

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Improvement of mechanical and biological properties of TiNi alloys by addition of Cu and Co to orthodontic archwires

Cited by 5 publications

References 23 publications

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Combinatorial Exploration and Mapping of Phase Transformation in a Ni–Ti–Co Thin Film Library

Mechanical properties of orthodontic wires on ceramic brackets associated with low friction ligatures

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