Faults in a Crystal models
Faults in a Crystal model
Faults in a Crystal Demo
Crystal Model Demo

 

Code Number: 1R50.40

Demo Title: Faults in a Crystal

Condition: Excellent

Principle: Crystal Formation and Structures.

Area of Study: Mechanics

Equipment:

Crystal Fault Demo, Ping-Pong Balls in Acrylic Container, BB's or Ball Bearings in Plastic Container.

Procedure:

Add the desired amount of ping-pong balls and arrange in an ordered fashion. Turn upside down of shake.  Faults will be readily apparent. 

Another twist is to use different colored ping-pong balls arranged in an ordered structure. Turn upside down or shake to show random crystal formation.

References:

  • Wallace A. Hilton, "Imperfections in Crystals", TPT, Vol. 8, # 6, Sept. 1970, p. 335.
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  • D. A. Kiewit, "A Simple Demonstration of the Pinning of Deformation Fronts", AJP, Vol. 40, #4, April 1972, p. 618.
  • Edward N. Sickafus, "Stacking-Fault Model fcc-hcp Unit-Cell Transformation", AJP, Vol. 34, #11, Nov. 1966, p. 1064.
  • Ma- 5, Freier and Anderson,  A Demonstration Handbook for Physics.
  • S- 200,  "Tennis Balls & Ball Bearings",  DICK and RAE Physics Demo Notebook.
  • Mark Wilson, "Nanoscale Ordering From Bulk Processing", Physics Today, May 2014, p. 15.
  • W. T. M. Irvine et al., "Taming Topological Defects with Light", Physics Today, Nov. 2013, p. 17.
  • N. Gravish, et. al, "Plowing Through a Granular Medium", Physics Today, October 2010, p. 22.
  • Steven K. Blau, "A Novel Composite is Stiffer Than Diamond", Physics Today, April 2007, p. 18.
  • Back Scatter, "Diamonds from the deep", Physics Today, February 2017, p. 80.
  • Yaakov Kraftmakher, "5.1, Equilibrium Point Defects in Metals", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 289.
  • Alan Holden and Phylis Morrison,  "Solids and Crystals",  Crystals and Crystal Growing,  p. 32- 37, and Plate 29.
  • "Models of Matter", Physics From the Junk Drawer, 3rd Edition, The Science House, North Carolina State University, p. 10.
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  • Borislaw Bilash II, “Metallic Bonding“, A Demo A Day – A Year of Physical Science Demonstrations, p. 126.