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Related Concept Videos

Nuclear Fusion02:45

Nuclear Fusion

The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of the problem,...
The Maximum Power Transfer Theorem01:20

The Maximum Power Transfer Theorem

Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
Nuclear Fission02:50

Nuclear Fission

Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large number of different...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

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Determining the Mechanical Strength of Ultra-Fine-Grained Metals
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Determining the Mechanical Strength of Ultra-Fine-Grained Metals

Published on: November 22, 2021

Fusion power: a challenge for materials science.

D M Duffy1

  • 1London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, , Gower Street, London WC1E 6BT, UK. d.duffy@ucl.ac.uk

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|June 23, 2010
PubMed
Summary

Developing materials for fusion power plants is a major challenge due to extreme conditions. This paper reviews favored materials and research methods for understanding radiation damage in fusion environments.

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Area of Science:

  • Materials Science
  • Nuclear Engineering
  • Plasma Physics

Background:

  • Fusion power plants present extreme operational conditions, including high particle flux, thermal loads, and mechanical stress.
  • The production of transmutation elements exacerbates material degradation in fusion environments.
  • Designing robust materials is critical for the viability and safety of fusion energy.

Purpose of the Study:

  • To discuss materials suitable for various components within a fusion power plant.
  • To review experimental and computational techniques for assessing radiation damage.
  • To identify key areas requiring further research and development.

Main Methods:

  • Review of existing literature on fusion materials.
  • Analysis of experimental data on material performance under irradiation.
  • Discussion of computational modeling approaches for predicting material behavior.

Main Results:

  • Identification of promising material candidates for different fusion power plant applications.
  • Overview of established and emerging techniques for studying radiation effects.
  • Highlighting the complex interplay between operational conditions and material degradation.

Conclusions:

  • Material selection for fusion power plants requires a comprehensive understanding of radiation damage mechanisms.
  • Continued research utilizing advanced experimental and modeling techniques is essential.
  • Further development is needed to ensure long-term material integrity in fusion environments.