Characteristic of intermetallic phases in cast dental CoCrMo alloy
Journal Title: Archiwum Odlewnictwa - Year 2010, Vol 10, Issue 3
Abstract
Apart from chromium and molybdenum, casting alloys of cobalt usually contain also up to 0.35 % of carbon. With significant content of carbon, presence of carbide-forming alloying elements results in creating carbide phases. These alloys are characterised by dendritic structure of solid solution of chromium and molybdenum in cobalt with interdendritically precipitated carbides. Because of high chromium content, dominating are M23C6-type carbides, but chromium-rich carbides can be also of M7C3 and M3C2-types. The other elements in the alloy result in creating M6C and MC-type carbides. In the case of low carbon content, creating carbides and forming intermetallic phases based on the alloying elements and cobalt become limited. The presented research was aimed at characterising structure of the cobalt-based dental alloy containing trace quantity of carbon. Characterised were intermetallic phases hardening the alloy. Microscopic examinations using light microscopy, SEM and TEM were carried out. Chemical microanalysis of the precipitates using X-ray analyser EDS was performed, as well as phase analysis using selected area electron diffraction.
Authors and Affiliations
M. Podrez-Radziszewska, K. Haimann, W. Dudziński, M Morawska-Sołtysik
Keywords
Related Articles
- EP ID EP72125
- DOI -
- Views 103
- Downloads 0
Rod and lamellar growth of eutectic
The paper presents adaptation problem of lamellar growth of eutectic. The formation of rod eutectic microstructure was investigated systematically. A new rod eutectic configuration was observed in which the rods form wit...
Applications of the systems theory to the designing of the sand preparation sub-system in foundry plants
This study provides the basic principles for designing the functional structure of manufacturing systems and their components. The analysis of functional values is applied to create the technological and manufacturing mo...
MAGMAsoft simulation applied in verification of technology to produce new range of alloy steel castings
The article presents the results of MAGMAsoft application in simulation of the pouring and solidfication of castings made from GS20Mn5 steel, basing on some principles adopted in the starting technology. The results of s...
Application of microjet in heat treatment of aluminium bronzes
Mechanical properties of a CuAl10Fe4Ni4 bronze subjected to solution heat treatment and toughening were examined. In solution heat treatment, a microjet was used to raise the cooling rate. A slight increase of mechanical...
Predicting ADI mechanical properties
Ductile cast iron was quench-hardened with the isothermal transformation according to two alternatives. The first treatment alternative consisted in the austenitizing process at temperature t = 830, 860 i 900°C and anne...