covid
Buscar en
Ciência & Tecnologia dos Materiais
Toda la web
Inicio Ciência & Tecnologia dos Materiais Low-temperature short-time nitriding of Va-group metals, V, Nb and Ta, in uncrac...
Journal Information
Vol. 28. Issue 2.
Pages 112-116 (July - December 2016)
Share
Share
Download PDF
More article options
Vol. 28. Issue 2.
Pages 112-116 (July - December 2016)
Special Issue on New Challenges in Energy Materials
Full text access
Low-temperature short-time nitriding of Va-group metals, V, Nb and Ta, in uncracked NH3 gas under heating with concentrated solar power (CSP)
Visits
1243
J.C. Fernandesa, F.A.C. Oliveirab, L.G. Rosaa, J. Rodríguezc, I. Cañadasc, T. Magalhãesb, N. Shohojib,
Corresponding author
nobumitsu.shohoji@lneg.pt

Corresponding author.
a UL - Universidade de Lisboa, IST - Instituto Superior Técnico, DEM - Departamento de Engenharia Mecânica, and IDMEC - Instituto de Engenharia Mecânica (Pólo IST), Av. Rovisco Pais, 1049-001 Lisboa, Portugal
b LNEG - Laboratório Nacional de Energia e Geologia I.P., Laboratório de Energia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal
c CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, PSA - Plataforma Solar de Almería, Apartado 22, E-04200 Tabernas (Almería), Spain
This item has received
Article information
Abstract
Bibliography
Download PDF
Statistics
Abstract

Over the last two decades, the authors have been using concentrated solar beam as the reaction heat source for synthesizing carbides and nitrides of d-group transition elements in view of usage of ecological renewable energy source in place of conventional heat sources using electricity or natural gas. In recent works, nitriding of VIa-group metals (Cr, Mo, W) and Fe in stream of NH3 gas with suppressed extent of dissociation (uncracked NH3) was attempted under heating with concentrated solar beam. It was demonstrated that mono-nitride δ-MoN of Mo and sub-nitride ¿-Fe2N of Fe that are known to be impossible to synthesize in N2 gas environment even at elevated N2 gas partial pressure p(N2) up to 300bar were successfully synthesized by the reactions of these metals in stream of NH3 gas under heating with concentrated solar beam up to 800°C.

In the present work, nitriding of Va-group metals (V, Nb and Ta) was attempted in stream of NH3 gas under irradiation of concentrated solar beam. After 90min heating in uncracked NH3 under concentrated solar beam up to 800°C, X-ray diffraction (XRD) characterization of the reaction products showed certain extent of nitriding progressed for all the specimens in spite of relatively low reaction temperature for short reaction duration.

Keywords:
Uncracked NH3 gas
nitride
V
Nb
Ta
CSP (concentrated solar power)
Full text is only aviable in PDF
References
[1]
E.K. Storms.
The Refractory Carbides.
Academic Press, (1967),
[2]
L.E. Toth:.
Transition Metal Carbides and Nitrides.
New York, (1971),
[3]
Gase und Kohlenstoff in Metallen,
[4]
H.O. Pierson:.
Handbook of Refractory Carbides and Nitrides: Properties, characteristics, processing and applications.
Noyes Publications, (1996),
[5]
Nitride Ceramics: Combustion Synthesis, Properties and Applications,
[6]
K. Inumaru, T. Nishikawa, K. Nakamura, S. Yamanaka.
Chem. Mater, 20 (2008), pp. 4756
[7]
W.-F. Chen, J.T. Muckerman, E. Fujita.
Chem. Commun, 49 (2013), pp. 8896
[8]
J. Rodríguez, I. Cañadas, E. Zarza:.
Energy Procedia, 49 (2014), pp. 1511
[9]
N. Shohoji, F.A.C. Oliveira, J.C. Fernandes, L.G. Rosa, J. Rodríguez, I. Cañadas, C. Ramos, T. Magalhães, F. Cestari.
Materialwiss Werkst, 44 (2013), pp. 959
[10]
F.A.C. Oliveira, L.G. Rosa, J.C. Fernandes, J. Rodríguez, I. Cañadas, T. Magalhães, N. Shohoji.
Solar Energy, 114 (2015), pp. 51
[11]
G. Hägg.
Z. Phys. Chem. B7, (1930), pp. 339
[12]
E. Lehrer.
Z. Elektrochem, 36 (1930), pp. 383
[13]
M. Katsura.
J. Alloys Compds, 182 (1992), pp. 91
[14]
H. Yoshizawa, N. Shohoji, M. Katsura, T. Sano, T. Yato.
Technol. Rep. Osaka Univ, 27 (1977), pp. 363
[15]
F.A.C. Oliveira, I.F. Vasques, J.C. Fernandes, I. Cañadas, J. Rodríguez, L.G. Rosa, N. Shohoji.
Solar Energy, 138 (2016), pp. 119
[16]
N. Shohoji, T. Marcelo, M. Katsura.
Solid State Ionics, 80 (1990), pp. 187
[17]
J.C. Fernandes, F.A.C. Oliveira, B. Granier, J.-M. Badie, L.G. Rosa, N. Shohoji.
Solar Energy, 80 (2006), pp. 1553
[18]
N. Shohoji, F.A.C. Oliveira, L.G. Rosa, G. Peraudeau, B. Granier, T. Magalhães, J.C. Fernandes.
Mater. Trans, 52 (2011), pp. 719
Copyright © 2016. Portuguese Society of Materials (SPM)
Article options
es en pt

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos