Íris Carneiro

Tuning B2-NiAl precipitate evolution in Cr-Fe-Ni-Al BCC-superalloys: CALPHAD design, thermal stability, and mechanical implications

Kan Ma, Thomas Blackburn, Xianbing Zhang, Vincent Gagneur et autres

Next-generation concentrated solar power (CSP) systems place stringent demands on structural materials that must operate reliably at temperatures exceeding 800 °C. Chromium-based BCC-superalloys strengthened by B2-NiAl intermetallic compounds are promising candidates for meeting these high-temperature requirements. Previous studies on Cr-5Ni-5Al and Cr-5Ni-5Al-10Fe …

High temperature zirconium alloys Zr-Al-Sn-(Si,Cr,V) by near- α titanium analogy

J.P. Magnussen, Íris Carneiro, Kan Ma, C. Coleman et autres

The use of conventional zirconium alloys at temperatures above 400 °C is limited by high temperature strength and creep resistance. This has prevented the consideration of zirconium alloys for fusion and Generation IV fission plant designs operating at 500 °C–1000 °C. The …

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Ductilisation of tungsten using rolling and rhenium alloying

Matthew J. Lloyd, Íris Carneiro, Jóhan P. Magnussen, Muhammad Naeem et autres

The brittleness of W at low temperatures remains a major challenge for its application in load-bearing components. To address this problem, two strategies were explored in this study: (1) the application of plastic deformation via rolling and (2) alloying with the ductilising …

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Effect of thermal ageing on sigma-phase formation and mechanical properties of Fe-Cr & Fe-Cr-Al alloys

Íris Carneiro, Matthew J. Lloyd, Cameron B. Yousefian, Jóhan P. Magnussen et autres

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Investigation of thermal stability of aluminum matrix nanocomposites using functionalized MWCNTs

Íris Carneiro, Sónia Simões

This work investigates the thermal stability of aluminum matrix nanocomposites reinforcing with functionalized multi-walled carbon nanotubes (MWCNTs). The effect of the chemical functionalization of MWCNTs (MWCNTs-COOH) was evaluated on the microstructure of these nanocomposites. One of the main challenges in producing metal …

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Microstructural Characterization of Al/CNTs Nanocomposites after Cold Rolling

Íris Carneiro, J.V. Fernandes, Sónia Simões

The deformation behaviour of aluminium reinforced by carbon nanotubes (Al/CNTs) nanocomposites during cold rolling was investigated in this work. Deformation processes after production by conventional powder metallurgy routes may be an efficient approach to improve the microstructure and mechanical properties by decreasing …

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Production and Characterization of Cu/CNT Nanocomposites

Íris Carneiro, Beatriz Monteiro, Bernardo Ribeiro, J.V. Fernandes et autres

In this research, copper nanocomposites reinforced with carbon nanotubes (CNTs) were produced by ultrasonication and conventional sintering, followed by cold rolling. These nanocomposites may be good candidates due to their excellent properties for components in the electrical, electronics, or aerospace industries with …

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Effect of the Functionalization Treatment of Mwcnts in the Microstructure of the Aluminum Matrix Nanocomposites

Íris Carneiro, Sónia Simões

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Investigation of Thermal Stability of Aluminum Matrix Nanocomposites Using Functionalized Mwcnts

Íris Carneiro, Sónia Simões

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Investigation of Thermal Stability of Aluminum Matrix Nanocomposites Using Functionalized Mwcnts

Íris Carneiro, Sónia Simões

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Investigation of Mechanical Properties of Al/CNT Nanocomposites Produced by Powder Metallurgy

Íris Carneiro, Sónia Simões

Demanding requirements in automotive and aerospace applications promote the growing need to obtain materials and advanced technology capable of combining low weight with high mechanical properties. Aluminum matrix nanocomposites could be great candidates to respond to such needs. In this sense, this …

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Deformation Behaviour of Cold-Rolled Ni/CNT Nanocomposites

Íris Carneiro, J.V. Fernandes, Sónia Simões

Metal matrix nanocomposites (MMNCs) reinforced by carbon nanotubes (CNTs) are good candidates to produce structural components in the mobility industry, given their unique properties. The manufacture of these components can involve plastic deformation. Therefore, it is crucial to understand whether reinforcement can …

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