HIGH STRENGTH, FLOWABLE, SELECTIVELY DEGRADABLE COMPOSITE MATERIAL AND ARTICLES MADE THEREBY

摘要

A lightweight, selectively degradable composite material includes a compacted powder mixture of a first powder and a second powder. The first powder comprises first metal particles comprising Mg, Al, Mn, or Zn, having a first particle oxidation potential. The second powder comprises low-density ceramic, glass, cermet, intermetallic, metal, polymer, or inorganic compound second particles. At least one of the first particles and the second particles includes a metal coating layer of a coating material disposed on an outer surface having a coating oxidation potential that is different than the first particle oxidation potential. The compacted powder mixture has a microstructure comprising: a matrix comprising the first metal particles; the second particles dispersed within the matrix; and a network comprising interconnected adjoining metal coating layers that extends throughout the matrix, the lightweight, selectively degradable composite material having a density of about 3.5 g/cm3 or less.

主权项

1. A lightweight, selectively degradable composite material comprising a compacted powder mixture of a first powder, the first powder comprising first metal particles comprising Mg, Al, Mn, or Zn, or an alloy of any of the above, or a combination of any of the above, having a first particle oxidation potential, and a second powder, the second powder comprising low-density ceramic, glass, cermet, intermetallic, metal, polymer, or inorganic compound second particles, at least one of the first particles and the second particles comprising a metal coating layer of a coating material disposed on an outer surface having a coating oxidation potential that is different than the first particle oxidation potential, the compacted powder mixture having a microstructure comprising:
a matrix comprising the first metal particles; the second particles dispersed within the matrix; and a network comprising interconnected adjoining metal coating layers that extends throughout the matrix, the lightweight, selectively degradable composite material having a density of about 3.5 g/cm3 or less.