Accession Number : ADA284411

Title :   Transport and Nucleation Processes During the Vapor Growth of Diamond.

Descriptive Note : Final rept. 1 Jul 89-29 Aug 94,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH

Personal Author(s) : Angus, John C.

Report Date : 29 AUG 1994

Pagination or Media Count : 31

Abstract : The growth of electronic grade diamond crystals at reasonable cost is limited by several factors - lower quality at high growth rates, secondary nucleation, and morphological instabilities. The research performed under this grant addressed these areas. Significant progress was made including: (1) identification of secondary nucleation mechanism through graphitic, sup2, precursors and; (2) determination of influence of twins on diamond growth rate and quality. Preliminary estimates were made of the parameter range that minimizes morphological instabilities. The results also have relevance for the general question of the relationship of diamond quality to growth rate and to the molecular mechanism of diamond growth. Diamond, Chemical Vapor Deposition, Nucleation, Transport Processes

Descriptors :   *DIAMONDS, *NUCLEATION, *RATES, *TRANSPORT, *CRYSTAL GROWTH, *CHEMICAL VAPOR DEPOSITION, COSTS, CRYSTALS, DETERMINATION, ELECTRONICS, ESTIMATES, IDENTIFICATION, PARAMETERS, PRECURSORS, QUALITY, SECONDARY, MORPHOLOGY, INSTABILITY, GRAPHITE, MOLECULAR PROPERTIES, TWINNING(CRYSTALLOGRAPHY), DEPOSITION.

Subject Categories : Inorganic Chemistry
      Crystallography
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE