Buscar
Mostrando ítems 1-10 de 129
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 ...
MgAl2O4-ZrO2(Y2O3) ceramic composite: Sintering and characterization
(2017-01-01)
Spinel is a ceramic material of excellent translucence when sintered in high densification, however, its low sinterability and toughness difficulty limit its use as an interesting material for dental applications. The use ...
Sliding wear of CaZrO3-MgO composites against ZrO2 and steel
(Elsevier, 2017-01)
The wear behaviour of a fine grained and dense CaZrO3-MgO composite is presented. Un-lubricated Pin-on-disc tests at room temperature have been performed using 10 N as normal force and 0.10–0.15 ms-1 as sliding rate and ...
Young’s modulus and hardness of multiphase CaZrO3-MgO ceramics by micro and nanoindentation
(Elsevier, 2018-04)
The aim of this work is to determine the values of the hardness and elastic modulus of the phases present in CaZrO3-MgO-ZrO2 composites and to analyse their contribution to the composite properties. Two materials previously ...
Catalisadores à base de Ni/(CeZr)O2/MgAl2O4 e Ni/(X2O3+ZrO2)/MgAl2O4 (X=La, Sm e Y) aplicados à tri-reforma do metano visando produção de hidrogênio e gás de síntese
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQCâmpus São Carlos, 2019-03-26)
The Methane Tri-Reforming (MTR) is a combination of Methane Dry Reforming (MDR) and Methane Steam Reforming (MSR) coupled with the Partial Oxidation of Methane (POM). In the present work, nickel catalysts supported on ...
CaZrO3-MgO structural ceramics obtained by reaction sintering of dolomite-zirconia mixtures
(Elsevier, 2016-08)
Processing and properties of two fine grain and dense CaZrO3-MgO based composites obtained by reaction sintering of pure ZrO2 and dolomite (CaMg(CO3)2) are described. Two dolomites with different levels of impurities were ...
Compositional and petrogenetic features of schistose rocks of ibadan area, southwestern nigeria
(UNIVERSIDAD NACIONAL DE COLOMBIA, 2009)
Amphibole and quartz schist which occur in association with migmatite gneiss, granitic gneiss and Pan African Older Granitebodies around Ibadan area, southwestern Nigeria, were studied with a view to elucidate their ...
Geochemistry of komatiites and basalts from the Rio das Velhas and Pitangui greenstone belts, São Francisco Craton, Brazil: Implications for the origin, evolution, and tectonic setting
(Elsevier Science, 2017-07)
The Neoarchean Rio das Velhas and Pitangui greenstone belts are situated in the southern São Francisco Craton, Minas Gerais, Brazil. These greenstone belts were formed between ca. 2.79?2.73 Ga, and consist mostly of mafic ...
Fortalecimento e tensões residuais em selantes vitrocerâmicos para células a combustível de óxido sólidoReforzamiento y tensiones residuales en sellos vitrocerâmicos para pilas de combustible de óxido sólido
(Universidade Estadual de Ponta GrossaBrasilDepartamento de FísicaPrograma de Pós-Graduação em CiênciasUEPG, 2020)