نتایج جستجو برای: hardness test
تعداد نتایج: 835243 فیلتر نتایج به سال:
thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...
introduction: mouthwashes which prevent and control caries and periodontal diseases are commonly used even without professional pre scription. long-term use of mouth-washes may cause softening of restorative composites and lowering the longevity of restoration. the aim of this study was evaluation of surface hardness value of a microhybride composite (filtek z250) after 12 hours immersion in th...
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