Consolidation of reactive nanocomposite powders

Demitrios Stamatis, Xiaoying Zhu, Alexandre Ermoline, Mirko Schoenitz, Edward Dreyzin, Paul Redner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

There is interest in replacing energetically inert structural components with reactive structures capable of highly exothermic reactions. Consolidated reactive materials are also desired for other applications, including reactive fragments, high density additives to explosives, insensitive pyrotechnic components, etc. Unlike nano-energetic compositions based on mixed nanopowders, reactive nanocomposite powders prepared by Arrested Reactive Milling (ARM) can be readily consolidated to achieve combined characteristics of high reactivity, low porosity, and structural strength. Different consolidation methods can be applied, and as a first step, a simple uniaxial pressing of nanocomposite powders is used in this project. A set of reactive nanocomposite powders with several Al-based thermite compositions prepared by ARM was used to prepare pellet-like consolidated samples. For various mechanical tests, both cylindrical and rectangular pellets were prepared with varied dimensions and varied degrees of compaction. Pellet compaction densities exceeding 90% of theoretical maximum density, were achieved. Despite the presence of Al and oxidizers, including MoO3, CuO, Bi2O3 and others, mixed on the nanoscale in different samples, no reaction was observed to be triggered by the powder compaction at pressures reaching 500 MPa. An experimental technique has been developed to study the thermal ignition initiation of the consolidated samples as a function of their physical and mechanical properties. The experimental technique will be used to develop a theoretical model to describe the ignition behavior of the consolidated materials.

Original languageEnglish (US)
Title of host publication45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
StatePublished - Dec 1 2009
Event45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Denver, CO, United States
Duration: Aug 2 2009Aug 5 2009

Publication series

Name45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

Other

Other45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
CountryUnited States
CityDenver, CO
Period8/2/098/5/09

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Control and Systems Engineering
  • Space and Planetary Science
  • Energy(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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