Twin Quintuplets in CVD Diamond

Abstract

The atomic structure of twin quintuplets in a chemical vapor deposited (CVD) diamond film was investigated by high resolution transmission electron microscopy (HRTEM). We conclude that the twin quintuplets have two main morphologies. The first consists of four Sigma = 3 twin boundaries and one Sigma = 81 twin boundary. The Sigma = 81 twin boundary contains the dislocations needed to accommodate a 7.35 deg misfit angle between a set of (111) planes on opposite sides of the boundary. In the second case, the 7.35 deg misfit angle is accommodated by two or more grain boundaries that are tilted slightly more than the 70.53 deg tilt of a Sigma = 3 boundary. These grain boundaries and the conventional diamond lattice twin boundaries are the only types of boundaries that we have observed in CVD diamond.

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Document Details

Document Type
Technical Report
Publication Date
Aug 26, 1992
Accession Number
ADA255862

Entities

People

  • A. Feldman
  • D. Shechtman
  • J. L. Hutchison

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Crystallography
  • Crystals
  • Diamond Films
  • Dislocations
  • Electron Microscopy
  • Films
  • Grain Boundaries
  • High Resolution
  • Jet Propulsion
  • Materials
  • Materials Science
  • Microscopy
  • Military Research
  • Transmission Electron Microscopy
  • United States
  • Universities

Readers

  • Materials Science and Engineering.
  • Regression Analysis.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene