Considering the use of niobium and titanium to enhance electrical and mechanical properties of copper at higher operational temperature application

Eze, Azunna Agwo; Jamiru, Tamba; Sadiku, Emmanuel Rotimi; Durowoju, Mondiu Ọlayinka; Kupolati, Williams Kehinde; Ibrahim, Idowu David

doi:10.1007/s42452-018-0080-1

Cited by 4 publications

(5 citation statements)

References 34 publications

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“…However, the presence of niobium oxides (NbO x ), copper oxides (CuO x ), and titanium oxides (TiO x ) contributed, immensely, to the NTE of the CuNbTiB 2 composite (Figs. 5,6,7,8,9,10) in this study.…”

Section: Density Relative Density and Microhardness Of The Sinteredmentioning

confidence: 49%

“…However, the extinction of the peaks in this study, which are responsible for the proper densifications, according to the work of Diouf and Molinari [25], could be attributed to the presence of dissolved oxygen in the samples, as can be seen in the SEM and EDS images (Figs. 5,6,7,8,9,10). The presence of oxygen in the sintering samples, during the spark plasma sintering process, hinders the densification mechanism [26].…”

Section: Displacement Rate As a Function Of The Temperature Of The Admentioning

confidence: 99%

“…Copper-niobium composites have been reported to have excellent mechanical properties [2][3][4]. It was reported that both the mechanical and electrical conductivity characteristics of copper-niobium, can conveniently and significantly surpass those of its competitive alloys, such as copper-titanium, copper-beryllium, and coppernickel-magnesium [5,6]. The increasing research on copper-niobium composites is due to the increasing demand for copper-based composites that have a good combination of excellent mechanical strength, electrical conductivity, and environmentally friendly, unlike copper-cadmium, and copper-beryllium that are harmful to humans and the environment [2].…”

Section: Introductionmentioning

confidence: 99%

“…The increasing research on copper-niobium composites is due to the increasing demand for copper-based composites that have a good combination of excellent mechanical strength, electrical conductivity, and environmentally friendly, unlike copper-cadmium, and copper-beryllium that are harmful to humans and the environment [2]. Copper-niobium alloy has demonstrated a combination of high strength and good electrical conductivity [2,3,5] and thermal conductive stability, at temperatures ranging between 400 and 1000 °C, without disruption [4]. The aforementioned properties would make it possible for copper-niobium to be the preferred candidate material for the fabrication of electrical devices that can withstand mechanical and thermal stresses.…”

Section: Introductionmentioning

confidence: 99%

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Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

et al. 2020

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This work investigated the effect of the sintering temperatures on the densification of the powders, density, relative density, microhardness, coefficient of thermal expansion, and corrosion resistance in sulphuric acid solution environment of copper-niobium-titanium di-boride composite. A 90% weight of copper, reinforced with a 6% weight of niobium micro-particles and 4% weight of titanium-diboride was prepared in powdered form and sintered in two different temperatures of 650 °C and 700 °C using the spark plasma sintering method. The crystal phases and the morphologies of both the starting powders and the sintered samples were analyzed by the use of X-ray diffraction with copper Alpha-K radiation and scanning electron microscopy with energy dispersive X-ray spectroscopy. The results show that sintering at a temperature of 700 °C reduced the displacement rate of the powders with a higher microhardness value of 941 MPa when compared with the sintering temperature of 650 °C, which prolonged the displacement rate of the powders with a lower microhardness value of 827 MPa. The sintered samples recorded negative thermal expansion values of − 1.375 × 10 −5 °C −1 and − 7.780 × 10 −6 °C −1 at temperatures of 650 °C and 700 °C, respectively. The sample sintered at 700 °C has better micro-hardness and better corrosion resistance in a sulphuric acid environment when compared to the one sintered at 650 °C. This study has shown that the varying of the sintering temperatures has an effect on the properties of the composite under study. The produced composites can be used to control the mechanical and electrical properties, and the thermal expansion of functional materials, such as superconductors, semiconductors, ferroelectrics, magnetic and Mott insulators, etc. Keywords Copper-metal matrix composites spark plasma sintering • Microstructure • Negative thermal expansion • Corrosion in sulphuric acid * Azunna Agwo Eze,

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Section: Density Relative Density and Microhardness Of The Sinteredmentioning

confidence: 49%

Section: Displacement Rate As a Function Of The Temperature Of The Admentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

et al. 2020

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“…Additionally, Nb has a low density, which helps maintain the lightweight nature of magnesium composites [27,54]. Nb reinforcement can also improve the wear resistance, corrosion resistance, and hightemperature stability [55][56][57]. Furthermore, Nb has a good biocompatibility, which makes it an attractive reinforcement material for biomedical applications [58].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Behavior Investigations of Nb-Reinforced Mg–Sn–Al–Zn–Mn Matrix Magnesium Composites

Erçetin

Özgün

Aslantaş

et al. 2023

Metals

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This research focuses on the fabrication and characterization of TAZ532-xNb composites, employing high-purity, micron-sized powders of Mg, Sn, Al, Zn, Mn, and Nb as the raw materials. These powders were subjected to a paraffin coating process aimed at mitigating oxidation. The formation of composites was achieved via hot pressing and was followed by surface preparation and analysis using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). An X-ray diffraction (XRD) study was conducted to identify the microstructural phases. Quantitative assessments including the theoretical density, actual density, and relative density were computed, and their fluctuations in relation to the increasing Nb reinforcement ratio were scrutinized. Furthermore, the mechanical attributes of the composites, such as hardness and tensile strength, were assessed via experimental procedures. The absence of oxygen-related peaks in the XRD patterns endorsed the successful execution of the paraffin coating technique and protective gas atmosphere during sintering. The detection of α-Mg, Mg2Sn, MgZn, Mg17Al12, and Nb phases within the Nb-reinforced composite patterns authenticated the formation of the intended phases. Notably, the relative density values of the composites surpassed 95%, indicating efficient sintering. SEM results disclosed a densely packed microstructure, with Nb reinforcement particles evenly distributed along the grain boundaries, devoid of particle clustering or significant grain growth. These composites manifested exceptional wetting characteristics, which can be attributed to the employment of Mg alloy as the matrix material. EDS data confirmed the proportions of Nb within the composites, aligning with the quantities incorporated during fabrication. The composites showcased an increase in microhardness values with the escalating Nb reinforcement ratio, credited to the harder constitution of Nb particles in comparison to the matrix alloy. Concurrently, tensile strength showed a significant improvement with the increment in Nb reinforcement, while elongation values peaked at a specific Nb reinforcement level. The positive evolution of tensile strength properties was ascribed to the escalated Nb reinforcement ratio, grain size, and consequent higher sample densities.

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Precipitation behavior and properties change of Cu–3Ti–2Ni alloy during aging process

Li,

Bi,

et al. 2024

Materials Science and Engineering: A

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Considering the use of niobium and titanium to enhance electrical and mechanical properties of copper at higher operational temperature application

Cited by 4 publications

References 34 publications

Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

Microstructural and Mechanical Behavior Investigations of Nb-Reinforced Mg–Sn–Al–Zn–Mn Matrix Magnesium Composites

Precipitation behavior and properties change of Cu–3Ti–2Ni alloy during aging process

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