Institute for Technology Research and Innovation (ITRI), Deakin University, Geelong, Vic. 3217, Australia.
Acta Biomater. 2010 Apr;6(4):1630-9. doi: 10.1016/j.actbio.2009.10.005. Epub 2009 Oct 6.
The influence of different amounts and types of process control agent (PCA), i.e., stearic acid and ethylene bis-stearamide, on the porous structure and mechanical properties of a biomedical Ti-16Sn-4Nb (wt.%) alloy was investigated. Alloy synthesis was performed on elemental metal powders using high-energy ball milling for 5h. Results indicated that varying the PCA content during ball milling led to a drastic change in morphology and particle-size distribution of the ball-milled powders. Porous titanium alloy samples sintered from the powders ball milled with the addition of various amounts of PCA also revealed different pore morphology and porosity. The Vickers hardness of the sintered titanium alloy samples exhibited a considerable increase with increasing PCA content. Moreover, the addition of larger amounts of PCA in the powder mixture resulted in a significant increase in the elastic modulus and peak stress for the sintered porous titanium alloy samples under compression. It should also be mentioned that the addition of PCA introduced contamination (mainly carbon and oxygen) into the sintered porous product.
研究了不同用量和类型的工艺控制剂（PCA），即硬脂酸和乙撑双硬脂酰胺，对生物医学 Ti-16Sn-4Nb（wt.%）合金多孔结构和力学性能的影响。采用高能球磨法在金属粉末上合成合金，球磨时间为 5h。结果表明，在球磨过程中改变 PCA 的含量会导致球磨粉末的形貌和粒径分布发生剧烈变化。从添加不同量 PCA 的粉末中烧结得到的多孔钛合金样品也显示出不同的孔形态和孔隙率。烧结钛合金样品的维氏硬度随 PCA 含量的增加而显著提高。此外，在粉末混合物中添加更多量的 PCA 会导致烧结多孔钛合金样品在压缩下的弹性模量和峰值应力显著增加。还应该提到的是，PCA 的添加会将污染（主要是碳和氧）引入烧结多孔产物中。
