Investigation of the contact angles between various molten metals and substrates of niobium and zirconium. Final report. [Sessile drop technique]

PDF Version Also Available for Download.

Description

The sessile drop technique was utilized for the determination of the contact angles between droplets of liquid tin, indium, and gallium; and substrates of niobium and zirconium. Contact angles, theta, were measured for various substrate surface roughness and over the temperature range 30 to 650/sup 0/C. Values of theta for all of these systems were found to be greater than 90/sup 0/ i.e., constituting a case of nonwetting between the liquid metals and the substrates. Three characteristic regions of the temperature dependence of contact angles were observed. A steady-state region in which the contact angle is relatively independent of temperature ... continued below

Physical Description

Pages: 78

Creation Information

Munir, Z.A. August 1, 1977.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Publisher

  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The sessile drop technique was utilized for the determination of the contact angles between droplets of liquid tin, indium, and gallium; and substrates of niobium and zirconium. Contact angles, theta, were measured for various substrate surface roughness and over the temperature range 30 to 650/sup 0/C. Values of theta for all of these systems were found to be greater than 90/sup 0/ i.e., constituting a case of nonwetting between the liquid metals and the substrates. Three characteristic regions of the temperature dependence of contact angles were observed. A steady-state region in which the contact angle is relatively independent of temperature was preceded and followed by regions in which theta decreased rapidly with increasing temperature. For the steady-state or second region, contact angles were found to be independent of time whereas in the third region contact angles showed a decreasing trend with time at constant temperature. In accordance with theoretical predictions for theta greater than 90/sup 0/, increasing roughness of the substrate caused a corresponding increase in theta. Electron microprobe analyses showed that only the Ga--Zr system exhibited evidence of diffusion at the interface. Photographs of the sessile drop of this system over a period of time indicated that the drop had spread over a greater area thus supporting the possibility of a surface diffusion mass-transport process.

Physical Description

Pages: 78

Notes

Dep. NTIS, PC A05/MF A01.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: UCRL-13677-2
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/5348146 | External Link
  • Office of Scientific & Technical Information Report Number: 5348146
  • Archival Resource Key: ark:/67531/metadc1072762

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • August 1, 1977

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

Description Last Updated

  • May 8, 2018, 12:20 p.m.

Usage Statistics

When was this report last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Munir, Z.A. Investigation of the contact angles between various molten metals and substrates of niobium and zirconium. Final report. [Sessile drop technique], report, August 1, 1977; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc1072762/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.