Metal Relative (of Nife <sub> 2 </ Sub> O <sub> 4 </ Sub> To +10 Of Nio) The Impact Of The Fund Cermet

The development of inert anodes and wettable cathodes has great significance for energy reduction, cost reduction, and green production of aluminum reduction industry. Because of having excellent corrosion resistant ability, the cermets based on the (NiFe₂O₄+10NiO) is one of the most hopeful materials which can be used to replace the carbon anode.Funded by the National Basic Research Program of China, i.e. 973 Program and National Hi-tech Research and Development Program of China, i.e. 863 Program, the density, mechanical properties and conductivity of several types of M/(NiFe₂O₄+10NiO) cermets which have different metal phase were studied in this paper. The mechanics about how the metal phase influent cermet's density and other prosperity was researched and then got a conclusions as follows:(a) Metal can promote the density of the M/(NiFe₂O₄+10NiO) cermets, and such effects will be stronger if the metal can combine with oxygen easily during the sinter course. But too much metal phase will reject the contraction of the ceramic matrix, then the density of the cermet will fall down.(b) Some metals like (70Cu-Ni) alloy can accelerate the densification speed of the cermets greatly when they were molten during the sintering course. In that case,the density of the cermet will rise while the percent of metal in the material increasing. The main mechanism should be solution-preciptation.(c) When the metal was diffusing in the matrix as particles, the cermet was toughened usually by the metal phase though being extracted from the matrix. In that case the ductility of the cermet was determined by the amount and strength of metal-ceramic interface and the main toughening mechanism should be crack deflection.(d) There are several factors can influent the bending strength of the cermets, such as the porosity ,strength of metal-ceramic interface and the microstructure. For x(80Cu-Ni)/(NiFe₂O₄+10NiO),the key factor is porosity; For xNi/(NiFe₂O₄+10NiO) the key factor is strength of metal-ceramic interface. (e) The conductivity and thermal shock resistance of the cermets grow while the content of metal phase increasing.The conductivity of the cermet was influented mainly by the contend of metal and porosity; The thermal shock resistance of the cermet was influented mainly by the contend of metal and the grainsize.