Tribaloys are Laves phases-hardened cobalt alloys usually produced by casting. In order to obtain a finer and more homogeneous microstructure, powder metallurgy was used by gas atomization of T400 Tribaloy powders followed by either spark plasma sintering (SPS) or hot isostatic pressing (HIP). Quantitative characterization of the microstructure was performed with X-ray diffraction, electron microscopy combined with energy-dispersive X-ray spectroscopy, at all stages of the processes. The gas atomized powder presents a fine composite microstructure composed of eutectic Laves phases and cobalt solid solution. The fraction of Laves phases increases upon consolidation time and temperature, with a composition tending to Co₃Mo₂(Si + Cr). This results in a hardness between 60 and 62 HRC for Spark Plasma Sintered and Hot Isostatic Pressed parts, depending on the consolidation parameters. The high solidification rates of atomization combined with powder consolidation lead to a fine-grained alloy, more homogeneous than cast alloys for the same grades.

Tribaloys是通常通过铸造生产的Laves相硬化钴合金。为了获得更精细，更均匀的微观结构，通过粉末冶金将T400 Tribaloy粉末进行气体雾化，然后进行火花等离子烧结（SPS）或热等静压（HIP）。在该过程的所有阶段，通过X射线衍射，电子显微镜结合能量色散X射线光谱学对微观结构进行定量表征。气体雾化粉末具有由共晶拉夫斯相和钴固溶体组成的精细复合微观结构。Laves相的比例随固结时间和温度的增加而增加，其组成趋向于Co ₃ Mo ₂（Si + Cr）。根据固结参数的不同，火花等离子烧结和热等静压零件的硬度在60到62 HRC之间。雾化的高凝固速率与粉末固结相结合，形成了细晶粒合金，比相同等级的铸造合金更均匀。