La2O3对TA2钛电解渗硼的影响

以无水硼砂为渗硼剂、K₂CO₃为活化剂、B₄C为供硼剂、La₂O₃为添加剂,对TA2金属钛进行电解渗硼,研究La₂O₃对渗硼层形貌的影响。结果表明,硼化层由表面层的TiB2和次外层的TiB晶须组成。在相同渗硼工艺条件下,不添加La₂O₃时,TiB晶须长度为92.61 μm,TiB2厚度为6.38 μm; 添加5%、10%和15%La₂O₃后,TiB晶须长度分别为100.39、121.65和144.83 μm,TiB₂厚度分别为5.83、5.28和5.30 μm,La₂O₃的加入促进了TiB晶须的生长,但降低了TiB₂层厚度。

Effect of La2O3 on Electrolytic Boronizing of TA2 Titanium

Effect of La₂O₃ on the morphology of boronised layer was studied by electrolytic boronising of TA2 titanium using anhydrous borax as boronising agent, K₂CO₃ as activator and B₄C as donor. The results showed that the boronised layer was comprised of surface TiB₂ and inner TiB whiskers. Without addition of La₂O₃, the length of the TiB whiskers was 92.61 μm and the thickness of the TiB₂ was 6.38 μm under the same boronising conditions. After adding 5%, 10% and 15% of La₂O₃, the length of the TiB whiskers was 100.39, 121.65 and 144.83 μm, respectively, and the thickness of the TiB₂ was 5.83, 5.28 and 5.30 μm, respectively. It is shown that the addition of La₂O₃ promoted the growth of TiB whiskers, but reduced the thickness of TiB₂.