Title page for ETD etd-01032006-203057


Type of Document Master's Thesis
Author Wensley, Charles Alexander
URN etd-01032006-203057
Title Processing and Properties of Amorphous NiW Reinforced Crystalline Ni Matrix Composites
Degree Master of Science
Department Materials Science and Engineering
Advisory Committee
Advisor Name Title
Aning, Alexander O. Committee Co-Chair
Kampe, Stephen L. Committee Co-Chair
Reynolds, William T. Jr. Committee Member
Keywords
  • Particulate Reinforcement
  • Amorphous
  • Mechanical Alloying
  • Metal Matrix Composites
Date of Defense 2005-12-16
Availability unrestricted
Abstract
Metal Matrix Composites (MMCs) are used as structural materials because of their ability to have a combination of high strength and good ductility. A common problem with MMCs utiliz-ing vastly different materials is the difficulty in forming a strong matrix/reinforcement interface without suffering extensive dissolution, debonding, or chemical reactions between the compo-nents. In this work, a nickel base amorphous particulate reinforced crystalline nickel matrix composite is processed. The reinforcement, an equimolar NiW amorphous powder, was synthe-sized using the mechanical alloying process. The amorphous and crystalline nickel powders were blended in varying volume fractions and then consolidated using hot-isostatic pressing (HIP). This work reveals that the amorphous NiW reinforcement provides strength and hardness to the ductile Ni matrix while simultaneously maintaining a strong interfacial bond due to the similar chemistry of the two components. The strengthening achieved in the composite is attrib-uted to the particulate/matrix boundary strengthening.
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