Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química Universidad Carlos III de Madrid Avda. de la Universidad, 30, 28911 Leganés (Madrid), Spain.
J Mech Behav Biomed Mater. 2012 Oct;14:29-38. doi: 10.1016/j.jmbbm.2012.05.013. Epub 2012 Jun 1.
The applicability of irregular prealloyed Ti-6Al-4V powder for the fabrication of titanium products by pressing and sintering and its employment as a master alloy to obtain the Ti-3Al-2.5V alloy was studied. To this end, the starting powders were characterised by dilatometry, differential thermal analysis and XRD. Green samples were obtained by cold uniaxial pressing, and the evolution of the microstructure over the sintering temperature range 900-1400°C was studied. The variation of the final density and mechanical properties with the sintering temperature was considered. Based on the study carried out, it can be stated that more reliable powders are needed to open the titanium market to new applications. A relative density of 95% and diverse microstructural features and mechanical properties equivalent to those of biomedical devices can be obtained by the pressing and sintering route.
研究了不规则预合金 Ti-6Al-4V 粉末在压制和烧结制备钛制品中的适用性，以及将其作为母合金获得 Ti-3Al-2.5V 合金的用途。为此，通过膨胀计法、差示热分析和 XRD 对起始粉末进行了表征。通过冷单向压制获得了绿色样品，并研究了在 900-1400°C 的烧结温度范围内微观结构的演变。考虑了最终密度和机械性能随烧结温度的变化。基于所进行的研究，可以指出需要更可靠的粉末来为新应用打开钛市场。通过压制和烧结工艺可以获得 95%的相对密度和与生物医学设备相当的各种微观结构特征和机械性能。
