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Orientational Effect in Nanohardness of Functionally Graded Microstructure in Enamel
Abstract Nanoindentation experiment was conducted on the enamel surface of extracted premolar tooth. The nanohardness constantly increased as the distance from a region close to the enamel dentine junction to the outer enamel zone was traversed. The plastic energy dissipated during the nanoindentation process also continuously increased as measurements were taken from the outer enamel zone to the inner enamel zone. The percentages of calcium and phosphorous measured by energy dispersive X-ray technique decreased from the outer enamel zone to the inner enamel zone. Further, local variation of nanohardness was explained in terms of different orientations of enamel rods as experimentally observed by the scanning probe microscopy.
Orientational Effect in Nanohardness of Functionally Graded Microstructure in Enamel
Abstract Nanoindentation experiment was conducted on the enamel surface of extracted premolar tooth. The nanohardness constantly increased as the distance from a region close to the enamel dentine junction to the outer enamel zone was traversed. The plastic energy dissipated during the nanoindentation process also continuously increased as measurements were taken from the outer enamel zone to the inner enamel zone. The percentages of calcium and phosphorous measured by energy dispersive X-ray technique decreased from the outer enamel zone to the inner enamel zone. Further, local variation of nanohardness was explained in terms of different orientations of enamel rods as experimentally observed by the scanning probe microscopy.
Orientational Effect in Nanohardness of Functionally Graded Microstructure in Enamel
Biswas, Nilormi (author) / Dey, Arjun (author) / Kundu, Saugata (author) / Chakraborty, Himel (author) / Mukhopadhyay, Anoop K. (author)
2012-10-01
9 pages
Article (Journal)
Electronic Resource
English
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