Knoop microhardness of single crystal sulphur
- 77 Downloads
The Knoop microhardness of single crystal sulphur was measured as a function of crystallographic orientation and applied test load on the (110) and (111) planes. Microhardnesses were determined to be in the range of 25–35 kg mm−2. Anisotropy of the microhardness and a normal indentation size effect (ISE) were observed. The ISE was addressed by the application of the traditional power law and the proportional specimen resistance model (PSR) of Li and Bradt. The load-independent hardness was determined, from which it was concluded that the (111) plane is harder than the (110) plane and also that the (111) plane is more anisotropic in microhardness.
KeywordsPolymer Sulphur Anisotropy Material Processing Crystallographic Orientation
Unable to display preview. Download preview PDF.
- 1.E. MEYER, Phys. Z. 9 (1908) 66.Google Scholar
- 2.E. O. BERNHARDT, Z. Metallkde 13 (1941) 135.Google Scholar
- 3.D. R. TATE, Trans. ASM 35 (1945) 374.Google Scholar
- 4.S. A. VARCHENYA, F. O. MUKTEPAVEL and G.P. UPIT, Soviet Phys. Solid State 11 (1970) 2300.Google Scholar
- 7.P. M. SARGENT and T. F. PAGE, Proc. Br. Ceram. Soc. 26 (1978) 209.Google Scholar
- 8.P. M. SARGENT, in “Microindentation Techniques in Materials Science and Engineering”, edited by P. J. Blau and B. R. Lawn, ASTM STP 889 (American Society for Testing Materials, Philadelphia, PA, 1984) p. 160.Google Scholar
- 9.G. H. FRISCHAT, in “Strength of Inorganic Glass”, edited by C. R. Kurkjian (Plenum, New York, 1985) p. 135.Google Scholar
- 13.Idem, J. Hard Mater. 3 (1992) 403.Google Scholar
- 19.B. I. SREBRODOLSKI and N. R. YUSHKIN, in “Constitution and Properties of Minerals” 2(IV) (Ukraine Academy of Sciences, Mineralogical Branch, Kiev, 1966) p. 35.Google Scholar
- 21.“Dana's System of Mineralogy”, Vol 1, 7th Edn, edited by C. Palache, H. Berman and C. Frondel (Wiley, New York, 1966) p. 139.Google Scholar
- 22.“Powder Diffraction File” Sets 6–10 (revised), Inorganic Vol. No. PD1S-10iRD (Joint Council Powder Diffraction Studies, Philadelphia PA, 1967) 8–247.Google Scholar