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

Lotfian, S. and Mayer, C. and Chawla, N. and Llorca Martinez, Francisco Javier and Misra, A. and Baldwin, J. K. and 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.

Description

Title: Effect of layer thickness on the high temperature mechanical properties of Al/SiC nanolaminates
Author/s:
  • Lotfian, S.
  • Mayer, C.
  • Chawla, N.
  • Llorca Martinez, Francisco Javier
  • Misra, A.
  • Baldwin, J. K.
  • Molina Aldareguía, Jon M.
Item Type: Article
Título de Revista/Publicación: Thin Solid Films
Date: 28 November 2014
Volume: 571
Subjects:
Freetext Keywords: Metal–ceramic composite; Multilayers; Layer thickness; Nanolaminate; High temperature nanomechanics; Nanoindentation
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 35458
DC Identifier: http://oa.upm.es/35458/
OAI Identifier: oai:oa.upm.es:35458
DOI: 10.1016/j.tsf.2014.06.022
Official URL: http://www.sciencedirect.com/science/article/pii/S004060901400666X#
Deposited by: Memoria Investigacion
Deposited on: 09 Jun 2015 12:51
Last Modified: 28 Nov 2016 23:30
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