Buscar
Mostrando ítems 1-10 de 445
Síntesis y caracterización de materiales nanoestructurados de Zr, V y Ti
(2014-03-21)
Zirconium-based materials, both oxides and metals, have been studied for their important technological applications. Specifically the ZrO2, due to its high stability, biocompatibility and corrosion resistance. The tetragonal ...
Influence of phase composition on the sliding wear of composites in the system CaZrO3–MgO–ZrO2 against ZrO2 and steel
(Elsevier Science, 2016-10)
An attractive way to obtain low cost calcium zirconate (CaZrO3) composites is mixing natural limestone or dolomite with zirconia. These CaZrO3 based ceramic composites were often investigated as a promising high refractory ...
Study of Ni and Pt catalysts supported on α-Al2O3 and ZrO2 applied in methane reforming with CO2
(Elsevier Science, 2007-01)
Ni and Pt catalysts supported on α-Al2O3, α-Al2O3-ZrO2 and ZrO2 were studied in the dry reforming of methane to produce synthesis gas. All catalytic systems presented well activity levels with TOF (s-1) values between 1 ...
Desenvolvimento de ZrO2/Al2O3 e ZrO2/Al2O3-NbC usando sinterização convencional e não convencional
(Universidade de São PauloLondrinaBrasilEngenharia e Ciência de MateriaisUSP, 2017-12-11)
High performance ceramic composites have been the subject of frequent studies in recent decades, aiming at improving mechanical properties and increasing their range of applications in technological products. This work ...
Nanocoating of Al2O3 additive on ZrO2 powder and its effect on the sintering behaviour in ZrO2 ceramic
(Springer, 2007-04-01)
ZrO2 powder was coated with Al2O3 precursor generated by a polymeric precursor method in aqueous solution. The system of nanocoated particles formed a core shell-like structure in which the particle is the core and the ...
Nanocoating of Al2O3 additive on ZrO2 powder and its effect on the sintering behaviour in ZrO2 ceramic
(Springer, 2007-04-01)
ZrO2 powder was coated with Al2O3 precursor generated by a polymeric precursor method in aqueous solution. The system of nanocoated particles formed a core shell-like structure in which the particle is the core and the ...
Corrosão e tribocorrosão de novas ligas Ti35Nb5Zr e Ti35Nb10Zr em saliva artificial
(Universidade Estadual Paulista (Unesp), 2012-05-14)
The long-life success of dental implants relies on the interaction between the biomaterial and oral environment, always involving electrochemical reactions, mechanical stresses and mechanical wear. In order to improve the ...
Densification and mechanical properties of ZrO2-CaAl4O7 composites obtained by reaction sintering
(Carl Hanser Verlag, 2016-09)
Composites of the ZrO2-CaO-Al2O3 system exhibit high corrosion resistance and high chemical stability, these being suitable properties for enhanced performance as refractories. In this work composites based on ZrO2-CaAl4O7 ...
CuO and CeO2 catalysts supported on Al2O3, ZrO2, and SiO2 in the oxidation of CO at low temperature
(ELSEVIER, 2008-07-01)
The effect of the support, Al2O3, ZrO2, and SiO2, on the activity for CO oxidation of a series of CuO and CeO2 monometallic and bimetallic catalysts was studied. The catalysts were prepared by coimpregnation of the support ...