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GaSe formation by mechanical alloying Ga50Se50 mixture

✍ Scribed by C.E.M. Campos; J.C. de Lima; T.A. Grandi; K.D. Machado; P.S. Pizani

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
125 KB
Volume
126
Category
Article
ISSN
0038-1098

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✦ Synopsis

Alloying of Ga with Se is observed in elemental Ga:Se ΒΌ 50:50 mixture upon high-energy ball milling. X-ray diffraction of samples milled in the 1=2 , t , 3 h range displays evidence of hexagonal gallium selenide (GaSe). At longer milling times t . 10 h two wide bands are superimposed on the crystalline pattern, indicating that the main milling product at longer t is an amorphous phase. Differential scanning calorimetry shows that the amorphous phase is a Ga -Se phase and that it grows in concentration with t: Raman scattering provides modes of both amorphous and crystalline GaSe phases.

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Aging of a nanostructured Zn50Se50 alloy
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✍ K.D. Machado; J.C. de Lima; C.E.M. de Campos; T.A. Grandi; A.A.M. Gasperini πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 English βš– 130 KB

The aging at room temperature of a nanocrystalline equiatomic ZnSe alloy produced by mechanical alloying was investigated using X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques. The measured XRD patterns showed the presence of the peaks corresponding to the crystalline