J 2013

Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy.

KADLEC, Jaromír a Filip ONDERKA

Základní údaje

Originální název

Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy.

Autoři

KADLEC, Jaromír a Filip ONDERKA

Vydání

Littera Scripta, České Budějovice, Vysoká škola technická a ekonomická v Českých Budějovicích, 2013, 1805-9112

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

20000 2. Engineering and Technology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Organizační jednotka

Vysoká škola technická a ekonomická v Českých Budějovicích

Klíčová slova anglicky

CoCrMo biocompatible alloy. Investment casting. Microstructure. Hardness and microhardness. Chemical composition.

Štítky

Příznaky

Recenzováno
Změněno: 18. 3. 2014 14:53, Mgr. Václav Karas

Anotace

V originále

The aim of this work is to compare two different as-cast CoCrMo alloys. The microstructure of a cobalt-base alloy obtained by the investment casting process was studied. These alloys comply with the ISO 5832-4 standard and are widely used in the manufacturing of orthopedic implants because of them high strength, good corrosion resistance and excellent biocompatibility properties. This work focuses on the resulting microstructure arising from samples poured in vacuum furnace. The characterization of the samples was achieved by using optical microscopy, scanning electron microscopy (SEM) and energy dispersion spectroscopy techniques (EDS) for semi-quantitative chemical analysis. The hardness was measured by instrumented indentation test, microhardness test was applied to investigate microhardness of matrix and precipitates. General the as-cast microstructure is a Co-fcc dendritic matrix with the presence of a secondary phase, such as the M23C6 carbides precipitated at grain boundaries and interdendritic zones. These precipitates are the main strengthening mechanism in this type of alloys.