Surface analyses and biocompatibility study of 500 °C oxidized Ni50Ti50 and Ni40Ti50Cu10 shape memory alloys

Chen, Ming-Chuan; Wu, S.K.

doi:10.1016/j.surfcoat.2009.01.012

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…According to their study, the TiNiCu thin-film micropump exhibited a high pumping yield, high working frequency, stable driving capacity, and long fatigue lifetime. Chen and Wu [21] Although TiNiCu SMAs are promising candidates for unique biomedical applications, degradations in the biocompatibility of TiNiCu SMAs implants may lead to the risk of released metal ions, in which Ni and Cu ions are typically considered potential health hazards. However, according to the literature review we conducted, the selective leaching properties of TiNiCu SMAs have not been studied in detail before.…”

Section: Introductionmentioning

confidence: 99%

Selective leaching and surface properties of Ti50Ni50−xCux (x=0–20at.%) shape memory alloys for biomedical applications

Chang

Chiu

2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Selective leaching and surface properties of Ti50Ni50−xCux (x=0–20at.%) shape memory alloys for biomedical applications

Chang

Chiu

2015

Applied Surface Science

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“…Ti 50 Ni 50 shape memory alloy (SMA) possesses excellent pseudoelasticity and shape memory effect [1,2]. Experimental results also demonstrate that Ti 50 Ni 50 SMA is characterized by a very good biocompatibility [3,4,5]. Thus, it has led to extensive applications in biomedicine and engineering [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Infrared Brazed Joints of Ti50Ni50 Shape Memory Alloy and Ti-15-3 Alloy Using Two Ag-Based Fillers

Lin

Shiue

et al. 2019

Materials

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The wettability, microstructures, and bonding strength of infrared brazing Ti-15-3 and Ti50Ni50 shape memory alloy using 72Ag-28Cu (wt.%) and 68.8Ag-26.7Cu-4.5Ti (wt.%) filler metals have been investigated. Only Ticusil® active braze readily wets both Ti50Ni50 and Ti-15-3 substrates. Wetting of eutectic 72Ag-28Cu melt on Ti50Ni50 base metal is greatly ameliorated by adding 4.5 wt.% Ti into the alloy. The brazed Ti-15-3/BAg-8/Ti50Ni50 joint consists of Cu-Ti intermetallics in the Ag-rich matrix. The formation of interfacial Cu(Ti,V) and (CuxNi1−x)2Ti intermetallics next to Ti-15-3 and Ti50Ni50 substrates, respectively, is attributed to the wetting of both substrates. The brazed Ti-15-3/Ticusil®/Ti50Ni50 joint shows a vigorous reaction, which results in the formation of a large amount of Ti2Ni intermetallics in the joint. The maximum joint strengths using BAg-8 and Ticusil® filler metals are 197 MPa and 230 MPa, respectively.

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“…The addition of Cu, which substitutes for Ni in NiTi SMAs, such as Ni 40 Ti 50 Cu 10 , improves the stability of the phase transformation temperatures responsible for the shape memory effect and pseudoelasticity (up to 8 % reversible strain) and narrows the phase transformation hysteresis [6][7][8][9][10][11][12]. Heat treatments can be used to enhance the mechanical properties, increase the phase transformation temperatures, and likely decrease Ni release, and thus, decrease toxic, allergic, and carcinogenic effects [13] by forming Ni 4 Ti 3 precipitates, which also improve the phase transformation recovery.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

Qiu

Young

2015

Shap. Mem. Superelasticity

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In order to better understand NiTi-based shape memory alloy foams for implant applications, Ni 40 Ti 50 Cu 10 foams were heat treated and then deformed under incremental and cyclic compression loading. After heat treatment, the microstructure consists of a (Ni,Cu)Ti matrix with small (Ni,Cu) 4 Ti 3 precipitates and a large Ti 2 (Ni,Cu) secondary phase. The heat-treated Ni 40 Ti 50 Cu 10 foam exhibits a two-step transformation, involving B19 0 ? B19 and B19 ? B2 on heating and B2 ? B19 and B19 ? B19 0 on cooling, respectively. One Ni 40 Ti 50 Cu 10 foam was compression loaded for 10 cycles at each subsequent strain level, i.e., 1, 2, 3, 4, 5, and 6 % strain. In each set of compressive stress-strain loops, the maximum stress level decreases due to plastic damage accumulation and/or retention of transformed martensite. Cross-sectional images from micro-computed tomography were collected during compression loading, which shows very uniform deformation without severe structural damage even up to 5 % strain. Localized deformation is visible at 6 % strain.

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Surface analyses and biocompatibility study of 500 °C oxidized Ni50Ti50 and Ni40Ti50Cu10 shape memory alloys

Cited by 8 publications

References 18 publications

Selective leaching and surface properties of Ti50Ni50−xCux (x=0–20at.%) shape memory alloys for biomedical applications

Selective leaching and surface properties of Ti50Ni50−xCux (x=0–20at.%) shape memory alloys for biomedical applications

Infrared Brazed Joints of Ti50Ni50 Shape Memory Alloy and Ti-15-3 Alloy Using Two Ag-Based Fillers

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

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