نتایج جستجو برای: wc co
تعداد نتایج: 338277 فیلتر نتایج به سال:
This paper deals with the characterization of three different commercial, WC-Co cemented-carbide tools in form saw blades, one group which exhibits more frequent cracking. Since properties these materials largely depend on microstructure, a detailed was carried out using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and diffraction (XRD). The SEM image analysis ...
A large specific surface area of WC nanopowder determines its high chemical activity and makes it very sensitive to various impurities, among which oxygen is most harmful unavoidable. During heating, interacts with carbon being removed in the form CO/CO 2 , finally leads appearance embrittling η-phases hard alloy, abnormal growth grains, formation a porous microstructure. To prevent heavy decar...
The aim of this study was to investigate the association between oral health status and central obesity (CO) in Brazilian independent-living elderly. A cross-sectional study was carried out in a sample of 489 elderly, who were participants of the Study on Aging and Longevity, in Londrina, state of Parana. The number of natural teeth and use of prostheses were evaluated according to the World He...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید