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铂族难熔金属─铱是唯一一种能够在２０００℃温度的侵蚀性介质中使用的结构材料。生产铱制品时必须解决的一个主要问题是如何排除其晶界脆性。研究表明，利用直径５０ｍｍ～６０ｍｍ的大单晶作坯料，是解决铱晶界脆性最有效的方法。 叶卡捷琳堡有色金属加工厂开发了利用原生铱
PGM refractory metals - iridium is the only structural material that can be used in aggressive media at temperatures up to 2000 ° C. A major issue that must be addressed when producing iridium products is how to rule out the grain boundary brittleness. The research shows that it is the most effective method to solve the brittleness of iridium grain boundaries by using large single crystal with diameter of 50mm ~ 60mm as blank. Ekaterinburg non-ferrous metal processing plant developed using native iridium