Direct laser metal sintering as a new approach to fabrication of an isoelastic functionally graded material for manufacture of porous titanium dental implants
Direct laser metal sintering as a new approach to fabrication of an isoelastic functionally graded material for manufacture of porous titanium dental implants
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DOI：
10.1016/j.dental.2008.03.029
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发表时间：
2008-11-01
期刊：
影响因子：
5
通讯作者：
Piattelli, A.
中科院分区：
文献类型：
--
作者：
Traini, T.;Mangano, C.;Piattelli, A.
目标.本工作的重点是钛合金植入物纳入梯度的孔隙率，从内核到外表面，通过激光烧结的金属粉末。对材料的表面形貌、显微组织、成分、力学性能和断口形貌进行了分析。所有的样品都是使用Ti-6Al-4V合金粉末通过选择性激光烧结程序制备的，所述合金粉末具有1-10 μ m的颗粒尺寸。通过扫描电镜和X射线能谱仪对样品进行了形貌和化学分析。通过使用通用试验机的三点弯曲试验来测定挠曲强度。使用共聚焦扫描激光显微镜研究表面粗糙度。表面粗糙度的变化进行了统计学评价，通过使用卡方检验。p值
Objectives. This work focuses on a titanium alloy implants incorporating a gradient of porosity, from the inner core to the outer surface, obtained by laser sintering of metal powder. Surface appearance, microstructure, composition, mechanical properties and fractography were evaluated.Methods. All the specimens were prepared by a selective laser sintering procedure using a Ti-6Al-4V alloy powder with a particle size of 1-10 mu m. The morphological and chemical analyses were performed by SEM and energy dispersive X-ray spectroscopy. The flexure strength was determined by a three-point bend test using a universal testing machine. The surface roughness was investigated using a confocal scanning laser microscope. The surface roughness variation was statistically evaluated by use of a Chi square test. A p value of