Mohammed Muneer Khan, Alahmari Abdulrahman, Alkhalefah Hisham, Abidi Mustufa Haider
Advanced Manufacturing Institute, King Saud University, PO Box 800, Riyadh, 11421, Saudi Arabia.
Industrial Engineering Department, King Saud University, PO Box 800, Riyadh, 11421, Saudi Arabia.
Heliyon. 2024 Aug 22;10(17):e36725. doi: 10.1016/j.heliyon.2024.e36725. eCollection 2024 Sep 15.
Zirconia ceramics are versatile materials with remarkable properties such as a high thermal resistance, high fracture strength, and low thermal conductivity. They are chemically inert and highly wear- and corrosion-resistant, making them ideal for a wide range of applications in the aerospace, automotive, and biomedical fields. In dentistry, zirconia ceramics are used for veneers, crowns, bridges, and implants because of their biocompatibility. Despite the various benefits of zirconia ceramics, they are difficult to process because of their high hardness and brittleness. Additive manufacturing (AM) has proven to be a viable alternative to conventional fabrication processes, particularly for the processing of difficult-to-cut materials. AM of ceramics has gained significant attention in recent years because of its flexibility and ability to produce customized geometries rapidly and economically. In this study, the digital light processing (DLP) technique was employed to 3D print yttria-stabilized zirconia. The fabricated zirconia was evaluated and characterized for use in dental applications. Thermogravimetric analysis (TGA) and differential thermogravimetry (DTG) were performed on the green body to assess the decomposition of the additives in the slurry and determine the debinding temperatures. The as-built parts were subjected to debinding and sintering to obtain fully dense zirconia parts. The parts tended to shrink after sintering; therefore, the shrinkage ratios were evaluated and found to be 1.2817, 1.2900, and 1.3388 in the x-, y-, and z-directions, respectively. The average density after sintering was 6.031 g/cc. The flexural strength determined using four-point bending tests was 451.876 MPa, and the tensile and compressive strengths were 143 MPa and 298.4 MPa, respectively.
氧化锆陶瓷是一种多功能材料，具有诸如高耐热性、高断裂强度和低热导率等显著特性。它们化学性质稳定，具有高度的耐磨性和耐腐蚀性，使其成为航空航天、汽车和生物医学领域广泛应用的理想材料。在牙科领域，由于其生物相容性，氧化锆陶瓷被用于制作贴面、牙冠、牙桥和植入物。尽管氧化锆陶瓷有诸多优点，但由于其高硬度和脆性，加工难度较大。增材制造（AM）已被证明是传统制造工艺的一种可行替代方案，特别是对于难切削材料的加工。近年来，陶瓷的增材制造因其灵活性以及能够快速且经济地生产定制几何形状而备受关注。在本研究中，采用数字光处理（DLP）技术对氧化钇稳定的氧化锆进行3D打印。对制造出的氧化锆进行评估和表征，以用于牙科应用。对坯体进行热重分析（TGA）和差示热重分析（DTG），以评估浆料中添加剂的分解情况并确定脱脂温度。对成型后的部件进行脱脂和烧结，以获得完全致密的氧化锆部件。部件在烧结后往往会收缩；因此，对收缩率进行了评估，发现其在x、y和z方向上分别为1.2817、1.2900和1.3388。烧结后的平均密度为6.031 g/cc。使用四点弯曲试验测定的弯曲强度为451.876 MPa，拉伸强度和压缩强度分别为143 MPa和298.4 MPa。
