A High Strength Ti–SiC Metal Matrix Composite

Rahman, K.M.; Vorontsov, V.A.; Flitcroft, S. M.; Dye, David

doi:10.1002/adem.201700027

Cited by 26 publications

(5 citation statements)

References 27 publications

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“…By incorporating commercial engineering ceramic reinforcers such as SiC, TiB, and TiC, a variety of TMCs have been successfully developed and examined to achieve desirable properties at both ambient and elevated temperatures [16][17][18] . Based on the characteristics of reinforcers, the development of TMCs can be categorized into three stages [15,19] : (1) considerable improvement in high-temperature durability such as creep resistance, the strong mechanically anisotropic effect together with the complexity in processing (mostly diffusion bonding technique) dramatically decrease their engineering application potential [20][21][22] In recent years, comparatively more attention has been directed into the investigation of the latter two types of TMCs [23] . Figure 1 | Specific strength versus service temperature for typical structural materials (data excerpted from ref.…”

Section: Introductionmentioning

confidence: 99%

Network-Strengthened Ti-6Al-4V/(TiC+TiB) Composites: Powder Metallurgy Processing and Enhanced Tensile Properties at Elevated Temperatures

Wei

Huang

et al. 2019

Metall Mater Trans A

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Section: Introductionmentioning

confidence: 99%

Network-Strengthened Ti-6Al-4V/(TiC+TiB) Composites: Powder Metallurgy Processing and Enhanced Tensile Properties at Elevated Temperatures

Wei

Huang

et al. 2019

Metall Mater Trans A

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“…Other studies have confirmed the formation of multiphase intermetallic composites containing TiC x , Ti 5 Si 3 C x , Ti 5 Si 3 , TiSi 2 , and SiC phases, with values of microhardness between 0.6 and 25 GPa for different phases, due to the exposure of mixtures of Ti and SiC at temperatures higher than 600 °C [ 13 ]. This phenomenon serves the useful purpose of increasing the surface wear resistance of built components [ 13 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

Thamae,

Maringa,

du Preez

2024

Materials

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Silicon carbide (SiC) exhibits intriguing thermo-physical properties such as higher heat capacity and conductivity, as well as a lower density than Ti6Al4V(ELI). These properties make SiC a good candidate for the reinforcement of Ti6Al4V(ELI) with respect to its use as a heat shield in aero turbines to increase their efficiency. The traditional materials used in aircraft structures were required to have a combination of good mechanical properties such as strength, stiffness, and hardness and low weight, as well as low thermo-physical properties such as coefficient of thermal expansion (CTE) and thermal conductivity. The alloy Ti6Al4V(ELI) has a density of 4.45 g/cm3, which is lower than that of structural steel (7.4 g/cm3) and higher than that of aluminium (2.5 g/cm3). Lower density benefits light weighting. Aluminium is the lightest of the traditional materials used but has relatively low strength. The CTE of SiC of 4.6 × 10−6/K is lower than that of Ti6Al4V(ELI) of 8.6 × 10−6/K, while the density of SiC of 3.21 g/cm3 is lower than that of Ti6Al4V(ELI) of 4.45 g/cm3. Therefore, from the theory of composites, SiC/Ti6Al4V(ELI) composites are expected to have lower densities and CTEs than those of Ti6Al4V(ELI), thus providing for lightweighting and less thermal related buckling or separation at their joints with carbon/epoxy resin panels. The specific strength, stiffness, and Knoop hardness of SiC of 75–490 kNm/kg, 132 MNm/kg, and 600–3800 GPa, respectively, are generally larger than those of Ti6Al4V(ELI) of 211 KNm/kg, 24 MNm/kg, and 880 GPa, respectively. Therefore, investigating reinforcement of Ti6Al4V(ELI) with SiC particles is worthwhile as it will lead to the formation of composites that are stronger, stiffer, harder, and lighter, with lower values of CTE. For additive manufacturing, this requires initial studies to optimise the process parameters of laser power and scanning speed for single tracks. To print single tracks in the present work, different laser powers ranging from 100 W to 350 W and scanning speeds ranging from 0.3 m/s to 2.7 m/s were used for different SiC volume fraction values of values. To print single layers, different values of hatch distance were used together with the best values of laser power and scanning speed determined elsewhere by the authors for different volume fractions of SiC. Through optical microscopy, the built tracks and their cross sections were examined. By using laser power and scanning speeds of 200 W and 1.2 m/s, and 150 W and 0.8 m/s, respectively, the best tracks at 5% and 10% volume fractions were obtained, whereas the best tracks at 25% volume fraction were achieved using a laser power of 200 W and a scanning speed of 0.5 m/s. Furthermore, the results showed that the maximum SiC volume percentage of 30% resulted in limited or no penetration. Therefore, it is concluded from the study that parts with improved mechanical properties can be produced at SiC volume fractions ranging from 5% to 25%, while parts produced at the high volume fraction of 30 % would have unacceptable mechanical qualities for the final part.

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“…Due to its wide band gap value, high breakdown electric field, good thermal and electrical conductivity, and high hardness and mechanical strength, SiC can be applied in the electronic (e.g., high power/high frequency devices) or automotive (e.g., brake discs) industry. [1] Silicon carbide is also used as the reinforcement in metal, [2][3][4][5][6][7][8] ceramic, [9,10] or polymer matrix composites. [11,12] SiC addition can improve the thermal or mechanical properties, [13] especially in the case of metal matrix composites.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

Chmielewski

Zybała

Strojny-Nędza

et al. 2023

Metall Mater Trans A

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The presented paper concerns the technological aspects of the interface evolution in the nickel-silicon carbide composite during the sintering process. The goal of our investigation was to analyse the material changes occurring due to the violent reaction between nickel and silicon carbide at elevated temperatures. The nickel matrix composite with 20 vol pct SiC particles as the reinforcing phase was fabricated by the spark plasma sintering technique. The sintering tests were conducted with variable process conditions (temperature, time, and pressure). It was revealed that the strong interaction between the individual components and the scale of the observed changes depends on the sintering parameters. To identify the microstructural evolution, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy were used. The silicon carbide decomposition process progresses with the extension of the sintering time. As the final product of the observed reaction, new phases from the Ni-Si system and free carbon were detected. The step-by-step materials evolution allowed us to reveal the course of the reaction and the creation of the new structure, especially in the reaction zone. The detailed analysis of the SiC decomposition and formation of new components was the main achievement of the presented paper.

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A High Strength Ti–SiC Metal Matrix Composite

Cited by 26 publications

References 27 publications

Network-Strengthened Ti-6Al-4V/(TiC+TiB) Composites: Powder Metallurgy Processing and Enhanced Tensile Properties at Elevated Temperatures

Network-Strengthened Ti-6Al-4V/(TiC+TiB) Composites: Powder Metallurgy Processing and Enhanced Tensile Properties at Elevated Temperatures

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

Microstructural Evolution of Ni-SiC Composites Manufactured by Spark Plasma Sintering

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