Journal ArticleDOI
Mechanism map for nucleation and growth of helium bubbles in metals
Kazunori Morishita,R. Sugano +1 more
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TLDR
In this paper, the total free energy of a system containing helium bubbles and point defects (vacancies, helium and self-interstitial atoms) was evaluated and activation barrier for forming a helium bubble was derived, where the effect of helium on helium bubble formation was clearly shown.About:
This article is published in Journal of Nuclear Materials.The article was published on 2006-07-01. It has received 45 citations till now. The article focuses on the topics: Atomic diffusion & Helium.read more
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Journal ArticleDOI
The role of interface structure in controlling high helium concentrations
TL;DR: In this paper, the authors review recent work that aims to gain such insight by determining how interface structure influences He trapping and the equation of state of He in interface bubbles as well as how He-induced hardening depends on interface area per unit volume in composite materials.
The role of interface structure in controlling high helium concentrations
TL;DR: In this article, the authors presented an award for Materials in Irradiation and Mechanical Extremes (CMIME) (Award 2008LANL1026) from the U.S. Dept of Energy.
Journal ArticleDOI
Phase-field modeling of gas bubbles and thermal conductivity evolution in nuclear fuels
Shenyang Y. Hu,Charles H. Henager,Howard L. Heinisch,Marius Stan,Michael I. Baskes,Steven M. Valone +5 more
TL;DR: In this paper, a phase-field model was developed to simulate the accumulation and transport of fission products and the evolution of gas bubble microstructures in nuclear fuels, taking into account the generation of gas atoms and vacancies, and the elastic interaction between diffusive species and defects.
Journal ArticleDOI
Pair potential for Fe-He
N. Juslin,Kai Nordlund +1 more
TL;DR: In this article, a repulsive pair potential for helium in bulk iron was developed to reproduce electronic structure calculations results from the literature for He defect formation and migration, and Ab initio data for short range Fe-He dimer interaction was used to describe the high energy part of the potential.
Journal ArticleDOI
Properties of Helium bubbles in Fe and FeCr alloys
Alfredo Caro,J. Hetherly,Alexander Stukowski,M. Caro,Enrique Martínez,S. Srivilliputhur,Luis A. Zepeda-Ruiz,Michael Nastasi +7 more
TL;DR: Caro et al. as discussed by the authors investigated three aspects of pure He that are relevant for its behavior in FeCr alloys, including the EOS of pure pure He, as an auxiliary element to relate pressure and density inside a bubble, and explored the influence of Cr as solute and at α′ precipitates on the He precipitation behavior.
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Book ChapterDOI
The Continuum Theory of Lattice Defects
TL;DR: In this paper, the authors present a discussion on the continuum theory of lattice defects, which is the usual theory of elasticity modified to include internal stress, and discuss some of the background principles and illustrates them by specific examples.
Journal ArticleDOI
Computer simulation of point defect properties in dilute Fe—Cu alloy using a many-body interatomic potential
TL;DR: In this paper, a set of many-body interatomic potentials has been developed for the Fe-Cu system, including modifications to ensure suitability for simulating atomic collisions at high energy.
Journal ArticleDOI
Temperature effects on the universal equation of state of solids
TL;DR: It is shown that for many solids the input data needed to predict high temperature thermodynamical properties can be dramatically reduced.
Journal ArticleDOI
Energetics and formation kinetics of helium bubbles in metals
TL;DR: In this paper, the formation kinetics of helium bubbles in metals are discussed, in particular for bubbles with radii between 10 and 1000 A containing helium under very high pressures (nonideal gas bubbles), and the bubble formation free energy is split into three parts: a helium bulk free energy which is considered for solid and fluid helium (high density equation of state), a bubble-matrix interface free energy for which curvature corrections are introduced, and a relaxation energy which was treated within the elastic continuum approach.
Related Papers (5)
Ab initio study of helium in α-Fe : Dissolution, migration, and clustering with vacancies
Chu-Chun Fu,Francois Willaime +1 more