Amorphization kinetics of Zr3Fe under electron irradiation

Arthur Thompson Motta, L. M. Howe, P. R. Okamoto

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Previous investigations using 40Ar ion bombardments have revealed that Zr3Fe, which has an orthorhombic crystal structure, undergoes an irradiation-induced transformation from the crystalline to the amorphous state. In the present investigation, 0.9 MeV electron irradiations were performed at 28 - 220 K in a high-voltage electron microscope (HVEM). By measuring the onset, spread and final size of the amorphous region, factoring in the Gaussian distribution of the beam, a kinetic description of the amorphization in terms of dose, dose rate and temperature was obtained. The critical temperature for amorphization by electron irradiation was found to be approx. 220 K, compared with 570 - 625 K for 40Ar ion irradiation. Also, the dose-to-amorphization increased exponentially with temperature. Results indicated that the rate of growth of the amorphous region under the electron beam decreased with increasing temperature and the dose-to-amorphization decreased with increasing dose rate. The size of the amorphous region saturated after a given dose, the final size decreasing with increasing temperature, and it is argued that this is related to the existence of a critical dose rate, which increases with temperature, and below which no amorphization occurs.

Original languageEnglish (US)
Title of host publicationAtomic Energy of Canada Limited, AECL (Report)
PublisherAECL
Pages1-16
Number of pages16
Edition10820
StatePublished - Nov 1 1994

Fingerprint

Electron irradiation
Amorphization
Kinetics
Ion bombardment
Temperature
Gaussian distribution
Dosimetry
Electron beams
Electron microscopes
Crystal structure
Irradiation
Crystalline materials
Electric potential

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Motta, A. T., Howe, L. M., & Okamoto, P. R. (1994). Amorphization kinetics of Zr3Fe under electron irradiation. In Atomic Energy of Canada Limited, AECL (Report) (10820 ed., pp. 1-16). AECL.
Motta, Arthur Thompson ; Howe, L. M. ; Okamoto, P. R. / Amorphization kinetics of Zr3Fe under electron irradiation. Atomic Energy of Canada Limited, AECL (Report). 10820. ed. AECL, 1994. pp. 1-16
@inbook{dae9f2b13f504b85a6af6ef2a6c1c9b3,
title = "Amorphization kinetics of Zr3Fe under electron irradiation",
abstract = "Previous investigations using 40Ar ion bombardments have revealed that Zr3Fe, which has an orthorhombic crystal structure, undergoes an irradiation-induced transformation from the crystalline to the amorphous state. In the present investigation, 0.9 MeV electron irradiations were performed at 28 - 220 K in a high-voltage electron microscope (HVEM). By measuring the onset, spread and final size of the amorphous region, factoring in the Gaussian distribution of the beam, a kinetic description of the amorphization in terms of dose, dose rate and temperature was obtained. The critical temperature for amorphization by electron irradiation was found to be approx. 220 K, compared with 570 - 625 K for 40Ar ion irradiation. Also, the dose-to-amorphization increased exponentially with temperature. Results indicated that the rate of growth of the amorphous region under the electron beam decreased with increasing temperature and the dose-to-amorphization decreased with increasing dose rate. The size of the amorphous region saturated after a given dose, the final size decreasing with increasing temperature, and it is argued that this is related to the existence of a critical dose rate, which increases with temperature, and below which no amorphization occurs.",
author = "Motta, {Arthur Thompson} and Howe, {L. M.} and Okamoto, {P. R.}",
year = "1994",
month = "11",
day = "1",
language = "English (US)",
pages = "1--16",
booktitle = "Atomic Energy of Canada Limited, AECL (Report)",
publisher = "AECL",
edition = "10820",

}

Motta, AT, Howe, LM & Okamoto, PR 1994, Amorphization kinetics of Zr3Fe under electron irradiation. in Atomic Energy of Canada Limited, AECL (Report). 10820 edn, AECL, pp. 1-16.

Amorphization kinetics of Zr3Fe under electron irradiation. / Motta, Arthur Thompson; Howe, L. M.; Okamoto, P. R.

Atomic Energy of Canada Limited, AECL (Report). 10820. ed. AECL, 1994. p. 1-16.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Amorphization kinetics of Zr3Fe under electron irradiation

AU - Motta, Arthur Thompson

AU - Howe, L. M.

AU - Okamoto, P. R.

PY - 1994/11/1

Y1 - 1994/11/1

N2 - Previous investigations using 40Ar ion bombardments have revealed that Zr3Fe, which has an orthorhombic crystal structure, undergoes an irradiation-induced transformation from the crystalline to the amorphous state. In the present investigation, 0.9 MeV electron irradiations were performed at 28 - 220 K in a high-voltage electron microscope (HVEM). By measuring the onset, spread and final size of the amorphous region, factoring in the Gaussian distribution of the beam, a kinetic description of the amorphization in terms of dose, dose rate and temperature was obtained. The critical temperature for amorphization by electron irradiation was found to be approx. 220 K, compared with 570 - 625 K for 40Ar ion irradiation. Also, the dose-to-amorphization increased exponentially with temperature. Results indicated that the rate of growth of the amorphous region under the electron beam decreased with increasing temperature and the dose-to-amorphization decreased with increasing dose rate. The size of the amorphous region saturated after a given dose, the final size decreasing with increasing temperature, and it is argued that this is related to the existence of a critical dose rate, which increases with temperature, and below which no amorphization occurs.

AB - Previous investigations using 40Ar ion bombardments have revealed that Zr3Fe, which has an orthorhombic crystal structure, undergoes an irradiation-induced transformation from the crystalline to the amorphous state. In the present investigation, 0.9 MeV electron irradiations were performed at 28 - 220 K in a high-voltage electron microscope (HVEM). By measuring the onset, spread and final size of the amorphous region, factoring in the Gaussian distribution of the beam, a kinetic description of the amorphization in terms of dose, dose rate and temperature was obtained. The critical temperature for amorphization by electron irradiation was found to be approx. 220 K, compared with 570 - 625 K for 40Ar ion irradiation. Also, the dose-to-amorphization increased exponentially with temperature. Results indicated that the rate of growth of the amorphous region under the electron beam decreased with increasing temperature and the dose-to-amorphization decreased with increasing dose rate. The size of the amorphous region saturated after a given dose, the final size decreasing with increasing temperature, and it is argued that this is related to the existence of a critical dose rate, which increases with temperature, and below which no amorphization occurs.

UR - http://www.scopus.com/inward/record.url?scp=0028549402&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028549402&partnerID=8YFLogxK

M3 - Chapter

SP - 1

EP - 16

BT - Atomic Energy of Canada Limited, AECL (Report)

PB - AECL

ER -

Motta AT, Howe LM, Okamoto PR. Amorphization kinetics of Zr3Fe under electron irradiation. In Atomic Energy of Canada Limited, AECL (Report). 10820 ed. AECL. 1994. p. 1-16