The microhardness indentation load/size effect in rutile and cassiterite single crystals

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ID: 118696
1993
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Abstract
The microhardness indentation load/size effect (ISE) on the Knoop microhardness of single crystals of TiO2 and SnO2 has been investigated. Experimental results have been analysed using the classical power law approach and from an effective indentation test load viewpoint. The Hays/Kendall concept of a critical applied test load for the initiation of plastic deformation was considered, but rejected to explain the ISE. A proportional specimen resistance (PSR) model has been proposed that consists of the elastic resistance of the test specimen and frictional effects at the indentor facet/specimen interface during microindentation. The microhardness test load, P, and the resulting indentation size, d, have been found to follow the relationship $$P = a_1 d + a_2 d^2 = a_1 d + (P_c /d_0^2 ) d^2$$ The ISE is a consequence of the indentation-size proportional resistance of the test specimen as described by a 1. a 2 is found to be related to the load-independent indentation hardness. It consists of the critical indentation load, P c, and the characteristic indentation size, d o.
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li1993journalthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors H. Li;R. C. Bradt;H. Li;R. C. Bradt;
Journal journal of materials science
Year 1993
DOI
doi:10.1007/BF00400874
URL
https://dx.doi.org/10.1007/BF00400874
Keywords
materials science polymer sciences solid mechanics general classical mechanics characterization and evaluation of materials crystallography and scattering methods

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