Solid-State Amorphization of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Zr</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Al: Evidence of an Elastic Instability and First-Order Phase Transformation

Rehn, L. E.; Okamoto, P.R.; Pearson, John; Bhadra, R.; Grimsditch, M.

doi:10.1103/physrevlett.59.2987

Cited by 167 publications

(59 citation statements)

References 21 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 Decomposition Fig. 8 The relation between T p =T m (T m is the melting point of DyCo 2 ) and the hydrogen pressure for the exothermic reactions for DyCo 2 .…”

Section: 3mentioning

confidence: 99%

“…On the other hand, it has been known that intermetallic compounds A x B 1Àx with the C15, B8 2 , C23, D0 19 and L1 2 structures amorphize by hydrogenation, [1][2][3][4][5][6][7][8][9][10][11][12][13][14] which is called hydrogen-induced amorphization (HIA). HIA is a practically important phenomenon, because it is closely related to the disproportional reaction that determines the lifetime of hydrogen storage alloys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pressure Dependence of Hydrogen-Induced Transformations in C15 Laves Phase DyCo2

Ishikawa

Aoki

2004

Mater. Trans.

View full text Add to dashboard Cite

Structural changes in C15 Laves phase DyCo 2 heated in a hydrogen atmosphere between 0.1 and 5.0 MPa were investigated using a pressure differential scanning calorimeter (PDSC) and were compared with those of DyFe 2 . Four exothermic reactions resulting from 1) hydrogen absorption forming crystalline and amorphous hydrides, 2) hydrogen-induced amorphization (HIA), 3) the precipitation of BiF 3 -type DyH 3 in the amorphous hydride and 4) the decomposition of the remaining amorphous hydride into DyH 3 + -Co were observed with increasing temperature. HIA in DyCo 2 occurred for every hydrogen pressure in contrast to DyFe 2 , because the pressure dependence of it is small. The mechanism of the phase transformations for DyCo 2 in a hydrogen atmosphere was discussed on the basis of the experimental results such as the pressure dependence of T p and T p =T m (the peak temperature/the melting point of DyCo 2 ), the enthalpy change ÁH, the activation energy E A and so on.

show abstract

“…3 Decomposition Fig. 8 The relation between T p =T m (T m is the melting point of DyCo 2 ) and the hydrogen pressure for the exothermic reactions for DyCo 2 .…”

Section: 3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure Dependence of Hydrogen-Induced Transformations in C15 Laves Phase DyCo2

Ishikawa

Aoki

2004

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8] Although the effect of hydrogenation on magnetic properties of C15 Laves phases RFe 2 has been extensively investigated by many groups, [9][10][11] the conditions and the mechanism of HIA in RFe 2 are still unclear. Recently, the present authors clarified origins of thermal peaks of C15 Laves phases RFe 2 during heating in 1.0 MPa H 2 .…”

Section: Introductionmentioning

confidence: 99%

Pressure Dependence of Hydrogen-Induced Amorphization in C15 Laves Phase TbFe2

et al. 2002

View full text Add to dashboard Cite

The pressure dependence of structural changes of C15 Laves phase TbFe 2 heated in a hydrogen atmosphere was investigated using a pressure differential scanning calorimeter (PDSC), a powder X-ray diffractometer (XRD), a differential scanning calorimeter (DSC) and a hydrogen analyzer. Hydrogen absorption in the crystalline state, hydrogen-induced amorphization (HIA), precipitation of TbH 2 and decomposition of the remaining amorphous alloy into α-Fe and TbH 2 occurred exothermally with increasing temperature above 0.5 MPa H 2 , independent of the heating rate. HIA and precipitation of TbH 2 occurred simultaneously in 0.2 MPa H 2 (0.33 K/s) and in 0.1 MPa H 2 (0.17 K/s). On the contrary, hydrogen absorbed crystalline c-TbFe 2 H 3.5 decomposed directly into α-Fe and TbH 2 in 0.1 MPa H 2 (0.33 K/s). That is, no amorphous phase was formed at the lower hydrogen pressure and at a high heating rate. The reason why HIA occurs above the critical hydrogen pressure and below the critical heating rate was discussed on the basis of the hydrogen content absorbed in the crystalline state of TbFe 2 .

show abstract

“…Making use of this merit, studies on conditions in which non-equilibrium solid phases, such as amorphous phases, chemical disordered phases and so on, can be successfully produced under MeV electron irradiation will be carried out by UHVEM. [1][2][3][4][5][6][7][8][9] As typical examples of the previous studies, electron-irradiationinduced amorphization in intermetallic compounds which consist of transition metals, borides, carbides or oxides has been examined and the relation between the tendency toward the amorphization and the position of those compounds in the temperature-composition phase diagram has been discussed. 10,11) In the present work, electron irradiation effects in III-V compounds, such as GaSb, GaAs and InAs, have been studied by UHVEM, in order to see the relation between the electronirradiation-induced structural change and the bonding character.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bonding Character on Electron-Irradiation-Induced Chemical Disordering and Amorphization in III-V Compounds

Yasuda¹,

Mori

2004

Mater. Trans.

View full text Add to dashboard Cite

Single crystals of GaSb, GaAs and InAs were irradiated with 2 MeV electrons in the [001] direction in an ultrahigh voltage electron microscope. When electron irradiations were carried out in the semiconductor compounds kept at low temperatures, chemical disordering is first induced and with continued irradiation amorphization sets in. The chemical disordering and the resulting amorphization become more difficult to occur in the sequence of the increasing ionisity (GaSb ! GaAs ! InAs) at a fixed low temperature.

show abstract

Solid-State Amorphization ofZr3Al: Evidence of an Elastic Instability and First-Order Phase Transformation

Cited by 167 publications

References 21 publications

Pressure Dependence of Hydrogen-Induced Transformations in C15 Laves Phase DyCo<SUB>2</SUB>

Pressure Dependence of Hydrogen-Induced Transformations in C15 Laves Phase DyCo<SUB>2</SUB>

Pressure Dependence of Hydrogen-Induced Amorphization in C15 Laves Phase TbFe<SUB>2</SUB>

Effect of Bonding Character on Electron-Irradiation-Induced Chemical Disordering and Amorphization in III-V Compounds

Contact Info

Product

Resources

About