Ductility of Mo-12Si-8.5B alloys doped with lanthanum oxide by the liquid-liquid doping method
Ductility of Mo-12Si-8.5B alloys doped with lanthanum oxide by the liquid-liquid doping method
复制标题
液-液掺杂法掺杂氧化镧的Mo-12Si-8.5B合金的延展性
DOI：
10.1016/j.jallcom.2015.04.047
复制
发表时间：
2015
影响因子：
6.2
通讯作者：
Sun Jun
中科院分区：
文献类型：
--
作者：
Li Wenhu;Zhang Guojun;Wang Shixiong;Li Bin;Sun Jun
采用液-液（L-L）掺杂、机械合金化和热压烧结技术制备了掺杂不同质量分数（0.3 wt%、0.6 wt%和0.9 wt%）氧化镧（La2O3）的Mo-12Si-8.5B（Mo-Si-B）合金。 Mo-Si-B合金显微组织的观察表明，随着La2O3掺杂量的增加，合金的晶粒尺寸得到细化。超过10 MPa m1/2合金的断裂韧性值表明，与固-固（S-S）掺杂法添加La2O3的合金相比，通过L-L掺杂法添加La2O3可以明显提高合金的断裂韧性。此外，压缩测试表明，与Mo-12Si-8.5B合金相比，该合金的压缩强度有所提高。
Mo–12Si–8.5B (Mo–Si–B) alloys doped with different mass fractions (0.3 wt%, 0.6 wt%, and 0.9 wt%) of lanthanum oxide (La2O3) were prepared by liquid–liquid (L–L) doping, mechanical alloying and hot pressing sintering techniques. The observation of the microstructures of the Mo–Si–B alloys reveals that the grain sizes of the alloys were refined with the increase in La2O3doping. The fracture toughness values of the alloys of over 10 MPa m1/2reveal that the addition of La2O3via the L–L doping method can obviously improve the alloy fracture toughness compared to the alloys doped with La2O3via the solid–solid (S–S) doping method. In addition, compression tests indicate that the compression strength of the alloys was improved compared to Mo–12Si–8.5B alloys.