现今,对耐热材料的研究是材料研究的最为重要的一个方面,世界各国自第二次世界大战以来,在这方面都获得了惊人的进展,新合金的陆续涌现,特别值得注意。 一般说来,热机的效率是随工作燃气温度的上升而提高的,我用取蒸气涡轮机和燃气涡轮机为例,并绘其热效率曲线如下: Nowadays, research on heat-resistant materials is the most important aspect of material research. Since the Second World War, all countries in the world have made remarkable progress in this field. New alloys are emerging in particular and worth noting. In general, the efficiency of the heat engine is increased with the rise of the working gas temperature, and I take the steam turbine and the gas turbine as examples, and draw the thermal efficiency curve as follows: