Ductility of Mo-12Si-8.5B alloys doped with lanthanum oxide by the liquid-liquid doping method

作者：Li, Wenhu; Zhang, Guojun^*; Wang, Shixiong; Li, Bin; Sun, Jun

来源：Journal of Alloys and Compounds, 2015, 642: 34-39.

DOI：10.1016/j.jallcom.2015.04.047

• Mo-Si-B alloy
• Lanthanum oxide
• Liquid-liquid doping
• Fine-grain strengthening

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 La2O3 doping. The fracture toughness values of the alloys of over 10 MPa m(1/2) reveal that the addition of La2O3 via the L-L doping method can obviously improve the alloy fracture toughness compared to the alloys doped with La2O3 via 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.

• 出版日期2015-9-5
• 单位陕西理工大学; 西安理工大学; 西安交通大学