scholarly journals Calorimetric Study of the Glassy State. VI. Phase Changes in Crystalline and Glassy-Crystalline 2,3-Dimethylbutane

1971 ◽  
Vol 44 (1) ◽  
pp. 78-89 ◽  
Author(s):  
Keiichiro Adachi ◽  
Hiroshi Suga ◽  
Syûzô Seki
Keyword(s):  
Glassy State ◽  
Phase Changes ◽  
Calorimetric Study

scholarly journals Calorimetric Study of Glassy State. IX. Thermodynamic Properties of Stannous Chloride Dihydrate and Dideuterate Crystals

1974 ◽  
Vol 47 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Takasuke Matsuo ◽  
Masaharu Oguni ◽  
Hiroshi Suga ◽  
S\^{y}uzô Seki ◽  
Johan F. Nagle
Keyword(s):  
Thermodynamic Properties ◽  
Stannous Chloride ◽  
Glassy State ◽  
Calorimetric Study ◽  
Chloride Dihydrate

Magnetic Eiaxaticn and Structural Transfor4Aticn in Metallic Glasses

1985 ◽  
Vol 58 ◽  
Author(s):  
R.C. O'Handley
Keyword(s):  
Metallic Glasses ◽  
Local Structure ◽  
Short Range ◽  
Amorphous Materials ◽  
Glassy State ◽  
Local Scale ◽  
Phase Changes ◽  
Reversible Transformation ◽  
Local Structures ◽  
Cobalt Base

ABSTRACTCurrent understanding of the local atomic structure of amorphous materials is reviewed. Sane results of probing short—range order by selected techniques are cited to illustrate the degree of uniformity that exists on a local scale. Observations of phase separation and phase changes are described with particular emphasis on a temperature driven, reversible transformation of the local structure observed magnetically in several cobalt—base glasses. The manifestations and implications of such transformations within the glassy state are examined. Several examples pointing to quasi—crystalline and to non—crystalline (non—space filling) local structures are given.

Investigation of the stability of glassy state in the Zr- and Hf-based glassy alloys correlated with their transformation behavior

2001 ◽  
Vol 16 (12) ◽  
pp. 3389-3401 ◽  
Author(s):  
Junji Saida ◽  
Chunfei Li ◽  
Mitsuhide Matsushita ◽  
Akihisa Inoue
Keyword(s):  
Dominant Role ◽  
Glassy State ◽  
Icosahedral Phase ◽  
Primary Phase ◽  
Phase Changes ◽  
Quasicrystalline Phase ◽  
Face Centered Cubic ◽  
Transformation Behavior ◽  
Glassy Alloys ◽  
The Stability

The transformation behavior from glassy state was investigated in Zr- and Hf-based glassy alloys. The primary phases are metastable face-centered-cubic (fcc) Zr2Ni and fcc Hf2Ni phases in the Zr65Al7.5Ni10Cu17.5 and Hf65Al7.5Ni10Cu17.5 glassy alloys, respectively. By substitution of 5 at.% Pd for Cu, the primary phase changes to an icosahedral quasicrystalline phase in both alloys. It is found that the addition of elements, which have a positive or weak chemical affinity with one of the constitutional elements in the Zr–Al–Ni–Cu and Hf–Al–Ni–Cu glassy alloys, is effective for the precipitation of the icosahedral phase. It is suggested that Pd plays a dominant role in an increase in the number of nucleation sites. Since an icosahedron is contained as a structure unit in the icosahedral, fcc Zr2Ni and fcc Hf2Ni phases, it is implied that these phases are correlated with the local icosahedral order. The high-resolution transmission electron microscopy images of the as-spun Zr65Al7.5Ni10Cu7.5Pd10 and Hf65Al7.5Ni10Cu12.5Pd5 alloys reveal a possibility of the existence of the icosahedral ordered regions. It is therefore, concluded that the icosahedral short- or medium-range order exists and it stabilizes the glassy state in the Zr- and Hf-based multicomponent alloys.

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