基于光固化的羟基磷灰石3D打印工艺研究

Study on 3D Printing Process of Hydroxyapatite Via Digital Light Processing

陶瓷材料因其强度高、密度低、耐高温及耐腐蚀等特点在航空航天领域具有广阔的应用前景。针对传统成型方式的局限性,对羟基磷灰石陶瓷材料的光固化3D打印工艺进行了研究。使用微米级羟基磷灰石粉末和光敏树脂,配制出可供3D打印的羟基磷灰石陶瓷浆料,成型出羟基磷灰石陶瓷坯体。根据TG–DSC热分析法,确定了陶瓷坯体的脱脂工艺参数,烧结出羟基磷灰石陶瓷样件。使用SEM扫面电镜观察样件表面形貌,通过X射线衍射分析物相组成,并通过阿基米德排水法测得其致密度,使用万能材料试验仪测量样件的抗弯强度。试验结果证明,利用光固化3D打印技术可以成型出致密度为94.9%,抗弯强度约为41.3MPa的羟基磷灰石陶瓷样件。

Because of its high strength, low density, high temperature resistance and corrosion resistance, ceramic materials have a broad application prospect in aerospace field. Aiming at the limitation of traditional molding method, the digital light possessing of hydroxyapatite is studied in this paper. Using micrometer hydroxyapatite powder and photo sensitive resin, the hydroxyapatite ceramic slurry for 3D printing was prepared and the hydroxyapatite ceramic blank was formed. Based on TG–DSC thermal analysis, the degreasing process parameters of ceramic green body were determined, and hydroxyapatite ceramic samples were sintered. The surface morphology of the sample was observed by SEM. The phase composition of the sample was analyzed by X-ray diffraction and the density was measured by Archimedes drainage method. The bending strength of the sample was measured by a universal material tester. The experimental results show that hydroxyapatite ceramic samples with density of 94.9% and flexural strength of 41.3MPa can be fabricated by using digital light pocessing.