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Applied Optics

Applied Optics


  • Vol. 10, Iss. 5 — May. 1, 1971
  • pp: 1134–1136

Atomistic Interpretation of Solid Solution Hardening from Spectral Analysis

J. N. Plendl  »View Author Affiliations

Applied Optics, Vol. 10, Issue 5, pp. 1134-1136 (1971)

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From analysis of a series of vibrational spectra of ir energy absorption and laser Raman, an attempt is made to interpret solid solution hardening from an atomistic point of view for the system CaF2/SrF2. It is shown to be caused by the combined action of three atomic characteristics, i.e., their changes as a function of composition. They are deformation of the atomic coordination polyhedrons, overlap of the outer electron shells of the atom pairs, and the ratio of the ionic to covalent share of binding. A striking nonlinear behavior of the three characteristics, as a function of composition, gives maximum atomic bond strength to the 55/45 position of the system CaF2/SrF2, in agreement with the measured data of the solid solution hardening. The curve for atomic bond Strength, derived from the three characteristics, is almost identical to the curve for measured microhardness data This result suggests that the atomistic interpretation, put forward in this paper, is correct.

© 1971 Optical Society of America

Original Manuscript: September 17, 1970
Published: May 1, 1971

J. N. Plendl, "Atomistic Interpretation of Solid Solution Hardening from Spectral Analysis," Appl. Opt. 10, 1134-1136 (1971)

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  1. J. N. Plendl, P. J. Gielisse, L. C. Mansur, S. S. Mitra, A. Smakula, P. C. Tarte, Appl. Opt. 10, 1129 (1971). [CrossRef] [PubMed]
  2. For pertinent literature, see Ref. 1.
  3. For definition, see Refs. 1 and 2.
  4. R. K. Chang, Brad Lacina, P. S. Pershan, Phys. Rev. Lett. 17, 755 (1966). [CrossRef]
  5. J. N. Plendl, “Damping of Lattice Vibrations in Solids,” Appl. Opt. 10, 87 (1971); also in AFCRL Rept. No. 69-0429 (1969). [CrossRef] [PubMed]
  6. For example, Ψ(I)=12=1:2 says that the covalent share of binding is twice the ionic share, i.e., the latter is one third of the total binding.
  7. To be eliminated for determining both damping and anharmonic factor.
  8. J. N. Plendl, Appl. Opt. 9, 2768 (1970); AFCRL Rep. 69-03531969; Characteristic Energy Absorption Spectra of Dielectric Solids (Plenum, New York, 1970). [PubMed]

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