Characterization of Two Base Metal Crown-And-Bridge Alloys,

Abstract

The present study assessed composition, microstructure properties and laboratory characteristics of Neydium and Ceramalloy. Analysis revealed that Neydium was based on a Ni (approx. 79%)-Cr (approx. 11%) binary system. Major components of Ceramalloy were Ni (approx. 70%) and Cr (approx. 20%). Neydium exhibited a continuous grain-boundary network as well as isolated spherical carbides. A dendritic carbide-precipitate was the predominant microstructural feature of Ceramalloy. Thick oxides that formed on the test alloys at temperatures between 1,200 and 1,800F impaired metal-porcelain bonding. Neydium-porcelain and Ceramalloy-porcelain combinations gave relatively low bond strength values of 2,700 and 4,800 psi, respectively. Copings and full coverage restorations cast from the material failed to seat completely. Neydium and Ceramalloy offer the advantages of high strength and rigidity.

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Document Details

Document Type
Technical Report
Publication Date
Mar 16, 1977
Accession Number
ADA037554

Entities

People

  • Eugene F. Huget
  • Jesus M. Vilca
  • Richard M. Wall

Organizations

  • United States Army Institute of Surgical Research

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abrasives
  • Alloys
  • Base Metal
  • Crystal Structure
  • Dental Materials
  • Dispersion Hardening
  • Gold Alloys
  • Hardness
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Metals
  • Microstructure
  • Modulus Of Elasticity
  • Porcelain
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Mathematics or Statistics
  • Parasitology and Pharmacology of Malaria.
  • Powder metallurgy of Titanium alloys.