Dislocation generation by microparticle inclusions

Xiaodi Zhong, Alexander G. Shtukenberg, Mingzhu Liu, Isabel A. Olson, Marcus Weck, Michael Ward, Bart Kahr

Research output: Contribution to journalArticle

Abstract

Microscopic inclusions are common sources of dislocations in solution-grown crystals, but the correspondence between the size and shape of inclusions and the probability of dislocation generation has not been established quantitatively. This correspondence is obtained herein through the use of spherical poly(styrene) particles with well-defined diameters, ranging from 1 to 90 μm, which were incorporated within potassium hydrogen phthalate crystals during growth from solution. The probability of generating dislocations by particle overgrowth increased with increasing supersaturation and particle size. The largest particles generate so many dislocations that daughter crystals emerge that are no longer in single-crystal register with the host. The results are consistent with a model that depends on surmounting the elastic energy of crystal layers associated with bending. Dislocation generation during the last stages of overgrowth is favored when the height difference between the growing layer and the particle protruding from the crystal surface is larger than a dislocation Burgers vector and the angle between the crystal surface and the particle surface is small enough that the growth layer can bend as it climbs onto the particle.

Original languageEnglish (US)
JournalCrystal Growth and Design
DOIs
StateAccepted/In press - Jan 1 2019

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microparticles
Dislocations (crystals)
inclusions
Crystals
Crystal growth from solution
crystal surfaces
Burgers vector
Styrene
Supersaturation
crystals
Potassium
phthalates
registers
Particle size
supersaturation
Single crystals
Hydrogen
crystal growth
potassium
polystyrene

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Dislocation generation by microparticle inclusions. / Zhong, Xiaodi; Shtukenberg, Alexander G.; Liu, Mingzhu; Olson, Isabel A.; Weck, Marcus; Ward, Michael; Kahr, Bart.

In: Crystal Growth and Design, 01.01.2019.

Research output: Contribution to journalArticle

Zhong, Xiaodi ; Shtukenberg, Alexander G. ; Liu, Mingzhu ; Olson, Isabel A. ; Weck, Marcus ; Ward, Michael ; Kahr, Bart. / Dislocation generation by microparticle inclusions. In: Crystal Growth and Design. 2019.
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