scholarly journals Porous NiTi Particle Dispersed Mg-Zn-Ca Bulk Metallic Glass Matrix Composites

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1959 ◽  
Author(s):  
Wei Guo ◽  
Hidemi Kato ◽  
Shulin Lü ◽  
Shusen Wu
Keyword(s):  
Metallic Glasses ◽  
Low Cost ◽  
Niti Shape Memory Alloy ◽  
Matrix Composites ◽  
Corrosion Properties ◽  
Widespread Application ◽  
Porous Niti ◽  
Alloy Particles ◽  
The Matrix ◽  
Glass Matrix Composites

Even though the Mg-based bulk metallic glasses (BMGs) have shown superior anti-corrosion properties compared with their crystalline counterparts, the brittleness of them limits the widespread application of these materials. In the present study, we have firstly introduced porous NiTi shape memory alloy particles into an Mg-Zn-Ca BMG by the direct adding method. This composite showed both improved compressive strength and corrosion resistance in Hank’s solutions than its monolithic glassy counterpart. The NiTi dispersoids among the matrix were likely to hinder the main shear band propagation, and also acted as the corrosion barriers. Furthermore, the porous nature of present added particle could further increase the interface areas, which should enhance the reinforcing effects compared with solid ones. This low-cost, high-anticorrosive composite was a good candidate as an engineering material.

scholarly journals Synthesis of Bulk Zr48Cu36Al8Ag8 Metallic Glass by Hot Pressing of Amorphous Powders

2021 ◽  
Vol 5 (1) ◽  
pp. 23
Author(s):  
Tianbing He ◽  
Nevaf Ciftci ◽  
Volker Uhlenwinkel ◽  
Sergio Scudino
Keyword(s):  
Metallic Glass ◽  
Metallic Glasses ◽  
Flow Behavior ◽  
Matrix Composites ◽  
Powder Consolidation ◽  
Low Viscosity ◽  
Flash Annealing ◽  
Amorphous Powders ◽  
Temperature Window ◽  
Glass Matrix Composites

The critical cooling rate necessary for glass formation via melt solidification poses inherent constraints on sample size using conventional casting techniques. This drawback can be overcome by pressure-assisted sintering of metallic glass powders at temperatures above the glass transition, where the material shows viscous-flow behavior. Partial crystallization during sintering usually exacerbates the inherent brittleness of metallic glasses and thus needs to be avoided. In order to achieve high density of the bulk specimens while avoiding (or minimizing) crystallization, the optimal combination between low viscosity and long incubation time for crystallization must be identified. Here, by carefully selecting the time–temperature window for powder consolidation, we synthesized highly dense Zr48Cu36Ag8Al8 bulk metallic glass (BMG) with mechanical properties comparable with its cast counterpart. The larger ZrCu-based BMG specimens fabricated in this work could then be post-processed by flash-annealing, offering the possibility to fabricate monolithic metallic glasses and glass–matrix composites with enhanced room-temperature plastic deformation.

Determination of Vibrational Characteristics of Coir, Banana and Aloe Vera Fibres Reinforced Hybrid Polymer Matrix Composites

2019 ◽  
Vol 24 (No 1) ◽  
pp. 12-19
Author(s):  
S. Vimal Anand ◽  
G. Venkatachalam ◽  
Tushar D. Nikam ◽  
Omkar V. Jog ◽  
Ravi T. Suryawanshi
Keyword(s):  
Polymer Matrix Composites ◽  
Low Cost ◽  
Aloe Vera ◽  
Natural Fibre ◽  
Fibre Volume ◽  
Matrix Composites ◽  
Green Composites ◽  
Hybrid Polymer ◽  
The Matrix ◽  
Vibrational Characteristics

In the last few years, green composites are becoming more suitable for applications over synthetic composite. There has been a growing interest in recent years in the utilisation of natural fibres in making low-cost building material. However, these natural fibre-based composites are not fully environmentally friendly because the matrix resins are non-biodegradable. In this paper, an attempt is made to fabricate green composites with coir, banana, and aloe vera fibres as reinforcement and hybrid polymer as matrix. The hybrid polymer is prepared from natural and synthetic resins. This work intends to find the vibrational characteristics of these composites. The influence of three parameters, i.e. CNSL in hybrid polymer, fibre volume, and fibre discontinuities on vibrational characteristics are considered. This work is carried out using FEA and the FEA results are validated by experimental results.

Production and characterization of Al 2024 matrix composites reinforced with β-Al3Mg2 complex metallic alloy particles

2013 ◽  
Vol 1517 ◽  
Author(s):  
Xiaorui Wang ◽  
Sergio Scudino ◽  
Jürgen Eckert
Keyword(s):  
Plastic Deformation ◽  
High Temperature Strength ◽  
Low Density ◽  
Matrix Composites ◽  
Specific Strength ◽  
Alloy Particles ◽  
The Matrix ◽  
Lightweight Composites ◽  
Al 2024

ABSTRACTIn this work, composites consisting of the Al 2024 matrix reinforced with β-Al3Mg2 particles have been produced by powder metallurgy with the aim of increasing the strength of the matrix and, at the same time, reducing the density of the material. The β-Al3Mg2 phase represents an ideal candidate as reinforcement in lightweight composites due to its low density and high-temperature strength. The β-Al3Mg2 reinforcement remarkably improves the mechanical properties of the 2024 matrix. In particular, the composite with 20 vol.% reinforcement display yield and compressive strengths exceeding that of the unreinforced matrix by about 120 and 180 MPa, while retaining appreciable plastic deformation of about 30 %. The strength of the material is further increased for the samples with 30 and 40 vol.% of β-Al3Mg2 phase, however, the composites show reduced plastic deformation of 11 and 4.5 %. Furthermore, the addition of the low-density β-Al3Mg2 particles decreases the density of the materials below that of the unreinforced 2024 matrix, considerably increasing the specific strength of the composites.

Comparison of Mechanical Properties of Banana Fibers Reinforcement in Different Thermoset Matrix Composites

2020 ◽  
Vol 1012 ◽  
pp. 20-25
Author(s):  
Fabio da Costa Garcia Filho ◽  
Michelle Souza Oliveira ◽  
Foluke Salgado de Assis ◽  
Artur Camposo Pereira ◽  
Fernanda Santos da Luz ◽  
...  
Keyword(s):  
Polymer Matrix Composites ◽  
Low Cost ◽  
Interfacial Strength ◽  
Matrix Composites ◽  
Banana Fiber ◽  
Lignocellulosic Fibers ◽  
Banana Fibers ◽  
Microscopic Evaluation ◽  
Strength Tests ◽  
The Matrix

Banana fibers are among the natural lignocellulosic fibers with greater potential for use as reinforcement in polymer matrix composites. Attractive mechanical and physical properties as well as low cost of production are considered as the main advantages on the use of such fibers. This works aims to study the mechanical behavior of the banana fiber when used as filler to the two most commonly used thermoset matrices (epoxy and polyester). The specimens were produced with up to 30 vol% of banana fibers for both polymeric matrices. Tensile strength tests as well as macroscopic and microscopic evaluation of the fractured surface were carried out. It was shown that, indeed, the banana fiber provided a substantial reinforcement for both matrices. On the other hand, mechanical strength associated with the composite epoxy/banana was more than 50% higher than the exhibit by the polyester/banana one. Such behavior could be associated with the interfacial strength regarding the fiber and the matrix.

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