Growth of Oriented C11(b) MoSi(2) Bicrystals Using a Modified Czochralski Technique

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Oriented bicrystals of pure C11<sub>b</sub> MoSi<sub>2</sub> have been grown in a tri-arc furnace using the Czochralski technique. Two single crystal seeds were used to initiate the growth. Each seed had the orientation intended for one of the grains of the bicrystals, which resulted in a 60&deg; twist boundary on the (110) plane. Seeds were attached to a water-cooled seed rod, which was pulled at 120 mm/h with the seed rod rotating at 45 rpm. The water- cooled copper hearth was counter-rotated at 160 rpm. Asymmetric growth ridges associated with each seed crystal were observed during growth and confirmed the existence ... continued below

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19 Pages

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Chu, F.; Garrett, J.D.; McClellan, K.J.; J.R., Michael; Mitchell, T.E. & Peralta, P. June 2, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 17 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
    Place of Publication: Albuquerque, New Mexico

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Oriented bicrystals of pure C11<sub>b</sub> MoSi<sub>2</sub> have been grown in a tri-arc furnace using the Czochralski technique. Two single crystal seeds were used to initiate the growth. Each seed had the orientation intended for one of the grains of the bicrystals, which resulted in a 60&deg; twist boundary on the (110) plane. Seeds were attached to a water-cooled seed rod, which was pulled at 120 mm/h with the seed rod rotating at 45 rpm. The water- cooled copper hearth was counter-rotated at 160 rpm. Asymmetric growth ridges associated with each seed crystal were observed during growth and confirmed the existence of a bicrystal. It was also found that careful alignment of the seeds was needed to keep the grain boundary from growing out of the boule. The resulting boundary was characterized by imaging and crystallographic techniques in a scanning electron microscope. The boundary was found to be fairly sharp and the misorientation between the grains remained within 2&deg; from the disorientation between the seeds.

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19 Pages

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  • Journal Name: (505)845-8220

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  • Other: DE00007227
  • Report No.: SAND99-1381J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 7227
  • Archival Resource Key: ark:/67531/metadc704654

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 2, 1999

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 28, 2016, 7:30 p.m.

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Chu, F.; Garrett, J.D.; McClellan, K.J.; J.R., Michael; Mitchell, T.E. & Peralta, P. Growth of Oriented C11(b) MoSi(2) Bicrystals Using a Modified Czochralski Technique, article, June 2, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc704654/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.