Study of Interfacial Adhesion between Nickel-Titanium Shape Memory Alloy and a Polymer Matrix by Laser Surface Pattern

Abstract

The aim of this article is to investigate the interfacial adhesion of Ni-Ti shape memory alloy with a polymer matrix of Poly (methyl methacrylate) (PMMA). The surface pattern on Ni-Ti plates was channeled by a solid state laser machine. The laser machine allows for creating channels on the Ni-Ti surface for infiltration of the PMMA matrix, which could be attached as an intra-surface locking pattern to the Ni-Ti surface. The influence of the PMMA matrix on the surface of the NiTi plate was evaluated by thermomechanical analysis (TMA) and dynamic mechanical analysis (DMA). The surface characterization was carried out by an optical microscope on the PMMA/NiTi composite after mechanical testing. During mechanical testing, the polymer displays the multiple cracks in the longitudinal direction that result in slipping and fracture. TMA and DMA analyses were performed on the Ni-Ti- and PMMA-coated Ni-Ti ribbon to observe elasticity and the storage modulus for both samples. Better adhesion than 80 % was observed in the Ni-Ti surface, in the laser surface pattern, in comparison to the free plain surface. However, the polymer acts as mechanical backing that caused a reduction in the shape-memory properties of the composite material.

In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel

“…The increased adhesion of the bilayers to the substrate might be due to interfacial bonding effects [83,84], and the result of their iso-structural crystallography, which permits the interdiffusion of the layers, and which is well documented in the literature [85,86]. interfacial bonding effects [83,84], and the result of their iso-structural crystallography, which permits the interdiffusion of the layers, and which is well documented in the literature [85,86]. Figure 3a,b present the SEM and AFM images of monolayers.…”

Antibacterial Activity and Iron Release of Organic-Inorganic Hybrid Biomaterials Synthesized via the Sol-Gel Route

“…The addition of PEG to the silica matrix is confirmed by the increase in the intensity of the peaks at 2927 cm −1 and 1454 cm −1 that are associated with C-H asymmetric stretching and bending, respectively. In addition, we observe a shift of this peak in pure PEG to 2870 cm −1 [25][26][27]. The presence of Fe(II)C (Figure 3) is detectable in curves (b-d) by an increase in the intensity of the peak at 1722 cm −1 , which is due to C=O stretching [28].…”

An Application Review of Fiber-Reinforced Geopolymer Composite

“…Based on various applications, geopolymer composites show better strength in a certain specific application at room temperature [68,69]. Synthetic carbon and E-glass fibers contribute toward better mechanical properties at RT and higher temperatures.…”