Effect of layer thickness on the high temperature mechanical properties of Al/SiC nanolaminates

Lotfian, S.; Mayer, C.; Chawla, N.; Llorca Martinez, Francisco Javier; Misra, A.; Baldwin, J. K. y Molina Aldareguía, Jon M. (2014). Effect of layer thickness on the high temperature mechanical properties of Al/SiC nanolaminates. "Thin Solid Films", v. 571 (n. Part 2); pp. 260-267. ISSN 0040-6090. https://doi.org/10.1016/j.tsf.2014.06.022.

Descripción

Título: Effect of layer thickness on the high temperature mechanical properties of Al/SiC nanolaminates
Autor/es:
  • Lotfian, S.
  • Mayer, C.
  • Chawla, N.
  • Llorca Martinez, Francisco Javier
  • Misra, A.
  • Baldwin, J. K.
  • Molina Aldareguía, Jon M.
Tipo de Documento: Artículo
Título de Revista/Publicación: Thin Solid Films
Fecha: 28 Noviembre 2014
Volumen: 571
Materias:
Palabras Clave Informales: Metal–ceramic composite; Multilayers; Layer thickness; Nanolaminate; High temperature nanomechanics; Nanoindentation
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Composite laminates on the nanoscale have shown superior hardness and toughness, but little is known about their high temperature behavior. The mechanical properties (elastic modulus and hardness) were measured as a function of temperature by means of nanoindentation in Al/SiC nanolaminates, a model metal–ceramic nanolaminate fabricated by physical vapor deposition. The influence of the Al and SiC volume fraction and layer thicknesses was determined between room temperature and 150 °C and, the deformation modes were analyzed by transmission electron microscopy, using a focused ion beam to prepare cross-sections through selected indents. It was found that ambient temperature deformation was controlled by the plastic flow of the Al layers, constrained by the SiC, and the elastic bending of the SiC layers. The reduction in hardness with temperature showed evidence of the development of interface-mediated deformation mechanisms, which led to a clear influence of layer thickness on the hardness.

Más información

ID de Registro: 35458
Identificador DC: http://oa.upm.es/35458/
Identificador OAI: oai:oa.upm.es:35458
Identificador DOI: 10.1016/j.tsf.2014.06.022
URL Oficial: http://www.sciencedirect.com/science/article/pii/S004060901400666X#
Depositado por: Memoria Investigacion
Depositado el: 09 Jun 2015 12:51
Ultima Modificación: 28 Nov 2016 23:30
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