Mechanical Strength of Silica Xerogels

Abstract

Mechanical strengths have been measured for silica xerogels using 4- point bending. The silica xerogels studied are microporous with open porosity of 53 vol %. Strengths were measured on fresh samples, samples which had been outgassed at 250 C, sample which were exposed to ambient conditions for 2 days, and sample stored in ethanol. Fresh samples stored in ethanol. Fresh samples had strengths about 20 MPa which increased to 32 MPa with outgassing but returned to 20 MPa after exposure. The loss of strength could be arrested but not reversed by storing the samples in ethanol. Polymers.

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Document Details

Document Type
Technical Report
Publication Date
Jun 20, 1990
Accession Number
ADA225020

Entities

People

  • Bennet Abramoff
  • Lisa C. Klein

Organizations

  • Rutgers University–New Brunswick

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alcohols
  • Body Weight
  • Contracts
  • Crack Tips
  • Cracks
  • Hardness
  • Materials
  • Mechanical Properties
  • Military Research
  • Moisture
  • New Jersey
  • Partial Pressure
  • Physical Properties
  • Porosity
  • Porous Materials
  • Silicon Dioxide
  • Strain Rate

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  • Mathematics or Statistics
  • Nanocomposite Materials Science