Observation of a Minimum Reaction Initiation Threshold in Ball-Milled Ni + Al Under High-Rate Mechanical Loading

Abstract

Two types of microstructurally distinct ball-milled Ni+Al powder compacts are characterized for the investigation of reaction initiation threshold under high-rate mechanical loading using a modified rod-on-anvil Taylor impact-test setup. It is observed that the kinetic energy required for reaction initiation is lower for the 95% theoretical maximum density (TMD) ball-milled powder compacts than for the 65% theoretical maximum density (TMD) compacts. The results are discussed on the basis of competing effects of reactivity enhancement and deformability reduction caused by prior ball-milling of the powder mixtures. ? 2011 American Institute of Physics.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2011
Accession Number
ADA541928

Entities

People

  • Eric B. Herbold
  • J L Jordan
  • Naresh N. Thadhani

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Ball Mills
  • Chemical Reactions
  • Dynamic Tests
  • Energetic Materials
  • Energy
  • Engineering
  • Explosives
  • Governments
  • Impact Tests
  • Kinetic Energy
  • Materials
  • Materials Science
  • Military Research
  • Munitions
  • Observation

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.