نتایج جستجو برای: wear of materials
تعداد نتایج: 21191106 فیلتر نتایج به سال:
This study evaluated the surface hardness and wear resistance of indirect composites (Artglass and Solidex) and the existence of a correlation between these properties. Twenty-four specimens (12 per material) were fabricated using a polytetrafluoroethylene matrix (5.0 mm in diameter; 7.0 mm high) following an incremental technique. Polymerization was done with a xenon stroboscopic light curing ...
OBJECTIVE To compare wear performance and resistance to crack propagation (K1C) of commercial restorative materials and their flowable variations. A potential correlation between three-body wear and fracture toughness, modulus of elasticity, fracture work, Vickers hardness, and filler content was investigated. METHOD AND MATERIALS Seven restoratives (five composites, one ormocer, and one comp...
INTRODUCTION The development of new, highly sophisticated materials for the articulating surfaces of total hip endoprostheses has led to an increasing demand for testing and verification. This includes tests and research regarding bio-compatibility, static load bearing capacity of the prostheses as well as tribological investigations. Since it has been found that wear debris play a dominant rol...
the application of a comprehensive model of communicative language ability (cla) to language teaching and testing has always been an imperative in l2 education since hymess proposal of communicative competence in the 1970s. recent l2 research has clearly underscored the importance of sufficient pragmatics representation as an essential component of cla in pedagogical and testing practices in l2...
The combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of various polymer materials under natural seawater lubrication was investigated. After the investigation, the wear morphology of the contact surface was observed by a laser scanning confocal microscope, and the texture of the wear scars and tracks were presented in 3D profiles. ...
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