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为了提高气体透平机、喷气发动机的输出功率及效率,要求开发高温下具有高强度及抗氧化性的Ni基超合金。当Ni基超合金中添加过量的Re,W,Mo等强化元素时,在高温环境下就析出拓朴密堆积相(TCP相),反而使高温强度显著下降。近年来的研究发现,添加铂族元素能够抑制TCP相的析出,因此含有铂族元素的第4代Ni基超合金可以添加比第3代Ni基合金更多的强化元素,实现抑制TCP相的析出,使合金具有优异高温强度,但这种合金的抗氧化性能有下降的趋势。添加Re的含Ru第4代Ni基超合金,对其抗氧化性能的研究报告尚不多,而含更多Ru的第5代Ni基超合金几乎尚未研究过抗氧化性能的问题。
In order to improve the output power and efficiency of gas turbines and jet engines, it is required to develop Ni-based superalloys with high strength and oxidation resistance under high temperature. When Ni-base superalloy is added with excessive elements such as Re, W, Mo and so on, the top-trending dense phase (TCP phase) is precipitated at high temperature, but the high temperature strength is obviously decreased. Recent studies have found that the addition of platinum group elements can inhibit the precipitation of the TCP phase, so the 4th generation Ni-based superalloys containing platinum group elements can be added more than the third generation Ni-based alloy strengthening elements to achieve the TCP phase inhibition Precipitation, so that the alloy has excellent high temperature strength, but the oxidation resistance of this alloy have a downward trend. There are not many reports on the oxidation resistance of Ru 4th generation Ni-based superalloys. However, the fifth generation Ni-based superalloys with more Ru have not been studied the anti-oxidation properties.