Author

Adnan Rasheed

Publication Date

2017

Document Type

Dissertation/Thesis

First Advisor

Salehinia, Iman

Degree Name

M.S. (Master of Science)

Department

Department of Mechanical Engineering

LCSH

Mechanical engineering

Abstract

The promise of nanocomposites lies in their multifunctionality, the possibility of realizing unique combinations of properties which are not attainable in traditional materials. Metal ceramic nanocomposite is one such unique combination which is becoming increasingly popular among researchers today. The idea is to combine the superior properties of ceramics like hardness and strength with favorable properties of metal such as ductility. Materials with these characteristics have potential for engineering applications such as highly efficient gas turbines, aerospace materials, automobiles, protective coatings, etc. This study focuses on the indentation and scratch performance of metal-ceramic nanolaminates. Molecular dynamics atomistic simulations were performed to study the scratch behavior of different models of Niobium Carbide (NbC) - Niobium (Nb) nanolaminates. The layer thicknesses were varied and the coefficient of friction was calculated for all the models. The prevailing deformation mechanisms with varying layer thicknesses were studied. The results demonstrate how the change in the layer thickness of metal along with the change in indenter size affects the scratch behavior of the multilayer model.

Comments

Advisors: Iman Salehinia.||Committee members: Rao Kilaparti; John Shelton.||Includes illustrations.||Includes bibliographical references.

Extent

50 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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