Laser spray cladding of porous NiTi coatings on NiTi substrates

Yang, Yujue; Man, Hau Chung

doi:10.1016/j.surfcoat.2006.12.015

Cited by 10 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the reviews by Shabalovskaya et al [29,30], this article will mostly survey work spanning the six years from 2002 to 2007, with an exclusive focus on fully porous NiTi materials, rather than NiTi with surface porosity (which has been shown to encourage bone ingrowth, e.g., Refs. [38][39][40]). In each section, the review will provide general observations, a summary of past work, and a future outlook.…”

Section: Introductionmentioning

confidence: 99%

Porous NiTi for bone implants: A review

Sargeant²,

et al. 2008

View full text Add to dashboard Cite

NiTi foams are unique among biocompatible porous metals because of their high recovery strain (due to the shape-memory or superelastic effects) and their low stiffness facilitating integration with bone structures. To optimize NiTi foams for bone implant applications, two key areas are under active study: synthesis of foams with optimal architectures, microstructure and mechanical properties; and tailoring of biological interactions through modifications of pore surfaces. This article reviews recent research on NiTi foams for bone replacement, focusing on three specific topics: (i) surface modifications designed to create bio-inert porous NiTi surfaces with low Ni release and corrosion, as well as bioactive surfaces to enhance and accelerate biological activity; (ii) in vitro and in vivo biocompatibility studies to confirm the long-term safety of porous NiTi implants; and (iii) biological evaluations for specific applications, such as in intervertebral fusion devices and bone tissue scaffolds. Possible future directions for bio-performance and processing studies are discussed that could lead to optimized porous NiTi implants.

show abstract

Section: Introductionmentioning

confidence: 99%

Porous NiTi for bone implants: A review

Sargeant²,

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Mixed Zr–Cu–Al–Ni powder was cladded on CP–Ti substrates by Wang et al and a number of intermetallic compounds associated with amorphous phase were found in the resultant coating with high microhardness and low friction coefficient. Many intermetallic compounds, composite materials, such as Ti–Al, Ti–Ni, Ti–TiC, Al–TiC, and Ti–Ni–B 4 C have also been introduced in laser cladding, which can enhance the hardness, wear resistance, and oxidation resistance of Ti and Ti alloys. Cermets, which are also named as ceramics/metal composites, have received considerable attentions as cladding materials in the recent years due to their higher hardness and wear resistance compared with the simple metals or alloys .…”

Section: Advanced Surface‐modification Methodsmentioning

confidence: 99%

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

View full text Add to dashboard Cite

Thanks to a considerable number of fascinating properties, titanium (Ti) and Ti alloys play important roles in a variety of industrial sectors. However, Ti and Ti alloys could not satisfy all industrial requirements; the degradation of Ti and Ti alloys always commences on their surfaces in service, which declines the performances of Ti workpieces. Therefore, with aim to further improve their mechanical, corrosion and biological properties, surface modification is often required for Ti and Ti alloys. This article reviews the technologies and recent developments of surface-modification methods with respect to Ti and Ti alloys, including mechanical, physical, chemical, and biochemical technologies. Conventional methods have limited improvement in the properties and/or restriction on the geometry of workpieces. Therefore, many advanced surfacemodification technologies have emerged in recent decades. New methods make Ti and Ti alloys have better performance and extended applications. With requirement of high surface properties in future. Understanding the mechanism in various surface-modification methods, combining the advantages of current technologies and developing new coating materials with high performance are required urgently. As such, incorporation of different surface-modification technologies with high-performance modified layers may be the mainstream of surface modifications for Ti and Ti alloys. . His current research interests focus on the metal additive manufacturing (e.g., selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructureproperties in high-performance materials.

show abstract

“…Particularly, its porosity has an induction in the bone tissue growing, which makes the fixation of implant more safe and reliable. The typical methods of fabricating porous NiTi include hot isostatic press (HIP) [10] , conventional sintering (CS) [11] , self-propagating high-temperature synthesis (SHS) [12] and laser spray [13,14] . The methods of HIP, CS and SHS can obtain the bulk porous NiTi.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, with the increase of porosity, both the mechanical strength and the corrosion resistance of porous NiTi almost linearly decrease [15] . Although laser spray is a more convenient method to prepare the porous NiTi surface and can OPTICS SPECIAL TOPIC ARTICLES keep the mechanical property of the base [13,14] , this method usually needs TiH 2 as a vesicant which may have a negative effect on the bioactivity of NiTi. Recently Wong et al [16] made an attempt to utilize Nd-YAG lasers to treat the NiTi alloy surface, and found that the oxidization depth increased.…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous microstructures on NiTi alloy surface with femtosecond laser pulses

et al. 2008

View full text Add to dashboard Cite

Porous microstructures on Nickel-Titanium (NiTi) alloy surfaces were prepared by linearly polarized femtosecond lasers with moving focal point at a certain speed. It was found that various novel microstructures from feather-like ripples to cluster-like porous textures could be formed with increasing laser energy. Particularly, when the laser energy was 400 μJ, a periodic porous metal surface was generated. Measurement of X-ray diffraction showed that the grains on the sample surface were refined through femtosecond laser ablation processes, but the crystal structures still kept their original states. Analysis by X-ray photoelectron spectroscopy revealed that Ni/Ti on the sample surface was changed with an evident oxidization of titanium element under different laser energies. This investigation provides a new approach to improve the biocompatibility of NiTi-based implant devices.femtosecond laser, NiTi alloy, porous microstructures, grain refinement

show abstract

Laser spray cladding of porous NiTi coatings on NiTi substrates

Cited by 10 publications

References 4 publications

Porous NiTi for bone implants: A review

Porous NiTi for bone implants: A review

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Preparation of porous microstructures on NiTi alloy surface with femtosecond laser pulses

Contact Info

Product

Resources

About