Microstructural Evolution in Laser Deposited Nickel-Titanium-Carbon in Situ Metal-Matrix Composites (Preprint)

Abstract

Laser deposition of a mixture of elemental nickel, titanium, and carbon (graphite) powders with varying compositions, via the laser engineered net shaping (LENS) process, has resulted in novel in situ metal-matrix composites. The microstructure in these in situ composites can be substantially tailored depending on the ratio of graphitic carbon to titanium added. A lower C/Ti ratio results in a harder composite consisting of primary titanium carbide precipitates within a eutectic matrix consisting of nickel and titanium carbide while a higher C/Ti ratio results in a softer composite consisting of primary graphitic carbon bundles within the same type of eutectic matrix. These composites have been characterized in detail using x-ray diffraction, scanning electron microscopy (including energy dispersive spectroscopy mapping), and, transmission electron microscopy.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA522087

Entities

People

  • A. R. Singh
  • J. Y. Hwang
  • Jaimie S. Tiley
  • R. Banerjee
  • S. Gopagoni
  • T. W. Scharf

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Ceramic Materials
  • Composite Materials
  • Deposition (Materials Processing)
  • Diffraction
  • Electron Microscopy
  • Graphitic Materials
  • Manufacturing
  • Materials
  • Materials Processing
  • Materials Science
  • Metal Matrix Composites
  • Microscopy
  • Scanning Electron Microscopy
  • Transmission Electron Microscopy
  • X Rays

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Microelectronics