Microstructure and precipitates in as-cast Co sub(3) sub(8)Ni sub(3) sub(3)Al sub(2) sub(9) shape memory alloy

Conventional transmission electron microscopy (CTEM) and electron diffraction studies together with advanced microscopy techniques (high-resolution transmission electron microscopy (HRTEM) and energy-filtered transmission electron microscopy (EFTEM)) were carried out in order to characterize the mic...

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Published inScripta materialia Vol. 57; no. 1; pp. 37 - 40
Main Authors Bartova, B, Schryvers, D, Yang, Z, Ignacova, S, Sittner, P
Format Journal Article
LanguageEnglish
Published 01.07.2007
Subjects
Electron microscopy
Microstructure
Nanocomposites
Nanomaterials
Nanostructure
Precipitates
Precipitation
Shape memory alloys
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Summary:Conventional transmission electron microscopy (CTEM) and electron diffraction studies together with advanced microscopy techniques (high-resolution transmission electron microscopy (HRTEM) and energy-filtered transmission electron microscopy (EFTEM)) were carried out in order to characterize the microstructure of an as-cast Co sub(3) sub(8)Ni sub(3) sub(3)Al sub(2) sub(9) shape memory alloy. Nanosized precipitates of face-centered cubic a-Co were observed in the specimen by means of CTEM, selected area diffraction and HRTEM. EFTEM measurements confirm that these precipitates are Co-rich. The orientation relationship between the largest precipitates and the B2 matrix is confirmed to be close to the Kurdjumow-Sachs orientation.
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ISSN:1359-6462
DOI:10.1016/j.scriptamat.2007.03.007