AN EXPERIMENTAL APPARATUS FOR THE MEASUREMENT OF SESSILE DROP CONTACT ANGLES AT ELEVATED TEMPERATURES.

Abstract

An equipment suitable for the measurement of the contact angles of molten sessile drops on solid substrate was developed. Temperatures up to 2250F may be readily controlled to within plus or minus 10F for long periods of time. The environment of the specimens may be either vacuum (to 0.00001 Torr) or a specific gas. Photographic techniques were used to record the contact angles. Experimental results of molten Na2B4O7 on metal substrates showed a standard deviation of less than 2 deg. The uncertainly introduced by the angle measurement process was shown not to exceed +2 or -2 deg. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1967
Accession Number
AD0658023

Entities

People

  • Tung Liu
  • W. L. Clow

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Biological Phenomena
  • Computing-Related Activities
  • Data Science
  • Ecological And Environmental Phenomena
  • Environment
  • Information Science
  • Interdisciplinary Science
  • Mathematical Analysis
  • Measurement
  • Standards
  • Substrates

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Spectroscopy.
  • Thin Film Deposition Science.