Radiation-induced crystalline-to-amorphous transition in intermetallic compounds of the CuTi alloy system

Lam, Nghi Q.; Okamoto, P.R.; Sabochick, Michael J.; Devanathan, Ram

doi:10.1016/0925-8388(93)90028-l

Cited by 19 publications

(7 citation statements)

References 36 publications

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“…4,21 This phenomenon has been confirmed by a body of molecular-dynamic simulations. [22][23][24] In the present case, the Debye temperature of Fe-Al solid solutions has been measured according to Eq. ͑2͒, as shown in Fig.…”

Section: ͑2͒mentioning

confidence: 99%

Lattice instability in the solid-state amorphization of Fe(Al) solid solutions by mechanical alloying

Sheng

Zhao

et al. 1997

Phys. Rev. B

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Section: ͑2͒mentioning

confidence: 99%

Lattice instability in the solid-state amorphization of Fe(Al) solid solutions by mechanical alloying

Sheng

Zhao

et al. 1997

Phys. Rev. B

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“…Intermetallic compounds in which secondary defects are easily formed under electron irradiation do not undergo SSA; this is because the number of lattice defects is less than the critical value required for the occurrence of SSA by thermal recovery. Previous researches on electron-irradiationinduced SSA have focused on the change in the elastic constants of intermetallic compounds [15][16][17]. However, very few studies have focused on the relationship between the thermal recovery of lattice defects and SSA.…”

Section: Introductionmentioning

confidence: 99%

Electron-irradiation-induced solid-state amorphization caused by thermal relaxation of lattice defects

et al. 2010

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“…6,13,46 This is not the case for coesite. According to our model, the critical amorphization dose is predicted to decrease with increasing temperature if there is a significant contribution of the thermal effect to amorphization.…”

Section: Thermodynamic Model For Amorphizationmentioning

confidence: 98%

Electron-irradiation- and ion-beam-induced amorphization of coesite

et al. 1996

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Electron-irradiation-induced amorphization in coesite was observed in situ as a function of temperature ͑15-750 K͒ at an incident electron energy of 1.0 MeV by transmission electron microscopy. Amorphization induced by ion-beam irradiation ͑1.5 MeV Kr ϩ ͒ in coesite was studied in situ as a function of temperature ͑15-875 K͒ using the high-voltage electron microscope ͑HVEM͒ Tandem Facility at Argonne National Laboratory. Electron-irradiation-induced amorphization in coesite was also observed at 200 keV and 300 K. Previously, the effect of temperature on amorphization was considered to only result in annealing, that is recovery of the damaged region. In this study, we show that temperature has an enhancing effect on amorphization and may even play a dominant role in the radiation-induced amorphization of some crystalline materials. The effect of temperature in enhancing amorphization was first theoretically and experimentally recognized in electronand ion-beam-irradiation-induced amorphization of coesite. Coesite has a melting temperature, T m ͑875 K͒, below its glass transition temperature, T g ͑1480 K͒. A thermodynamic analysis has been made to model the critical amorphization dose-temperature dependencies of electron-and ion-beam irradiations. We propose that the thermodynamic contributions to amorphization include the free-energy increase due to defect accumulation caused by irradiation and chemical disordering, ⌬G def and ⌬G dis , and a thermal contribution, ⌬G therm . The thermodynamic condition for amorphization is generalized by the expression ⌬G total ϭ⌬G therm ϩ⌬G def ϩ⌬G dis у⌬G am , where ⌬G total is the total free-energy increase for the irradiated crystal, and ⌬G am is the free-energy level required for solid-state amorphization. Coesite provides a good example of the dominance of the thermal contribution in amorphization. Solid-state amorphization of coesite induced by electron and ion irradiations is an irradiation-enhanced thermodynamic melting process below the glass transition temperature, T g . The competition among thermally created dynamic displacements, irradiation-induced static displacements, and the increased annealing rate at elevated temperatures, determines the critical amorphization dosetemperature dependencies of electron-and ion-irradiated coesite.

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Radiation-induced crystalline-to-amorphous transition in intermetallic compounds of the CuTi alloy system

Cited by 19 publications

References 36 publications

Lattice instability in the solid-state amorphization of Fe(Al) solid solutions by mechanical alloying

Lattice instability in the solid-state amorphization of Fe(Al) solid solutions by mechanical alloying

Electron-irradiation-induced solid-state amorphization caused by thermal relaxation of lattice defects

Electron-irradiation- and ion-beam-induced amorphization of coesite

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