Selectrion of materials for use at temperatures above 1500 deg.C in oxidizing atmospheres

摘要

the purpose of this work was to select materials for applications in oxidizing atmospheres at temperatures of minimum of 1500 deg.C. several requirements had to be fulfilled, e.g. long-term oxidation resistance, low vapour pressure, creep resistance and low gas permeability. Another important point was to avoid reactions and sintering in material combinations with silica forming materials. The investigation was based on a detailed literature screening, followed by compatibility tests at 1600 deg.C in air with potential materials (Al_2O_3, ZrO_2, CeO_2, La_2O_3, Y_2O_3, HfO_2, MgO.Al_2O_3) and MoSi_2 as an example of a silica-forming material.