Orthorhombic ε -phases and transitional structures in Al—Pd—(Fe)

✍ Scribed by Balanetskyy, Sergiy; Grushko, Benjamin; Velikanova, Tamara Ya.

• Book ID: 120631397
• Publisher: Oldenbourg Wissenschaftsverlag
• Year: 2004
• Tongue: English
• Weight: 664 KB
• Volume: 219
• Category: Article
• ISSN: 2194-4946
• DOI: 10.1524/zkri.219.9.548.44040

✦ Synopsis

Abstract

The results of an investigation of the structures formed in the range of about Al~73~Pd~27~ to Al~76~Pd~14~Fe~10~ by electron diffraction and high-resolution transmission microscopy are reported. The orthorhombic ε
~6~, ε
~16~, ε
~22~ and ε
~28~ phases were observed in specific compositional sub-ranges. Their lattice parameters a ≈ 2.34 and b ≈ 1.62 nm are essentially the same while the c parameters are ≈1.23, 3.24, 4.49 and 5.70 nm, respectively. Apart from these regular structures, also structures aperiodic along the c-direction are revealed at intermediate compositions. Thus, inside the wide ε-phase range only slight continuous variations of the orthorhombic a and b cell parameters are accompanied by complicated modulations of the c cell parameter.