Laser texturing of zirconia-alumina ceramics is a promising surface modification method for many applications, such as enhancing osseointegration of alumina toughened zirconia (ATZ) dental implants or improving friction behavior of zirconia toughened alumina (ZTA) hip replacement bearing components. The common problems in laser texturing of ATZ/ZTA ceramics are thermal cracking, low material removal rate (MRR), and laser-induced phase transformation (LIPT). Furthermore, the compositional variation of those ceramics will complicate these problems. In order to improve the manufacturing processability, ultrashort pulsed laser ablation behavior of ATZ/ZTA composites was investigated in this research. Single phase zirconia and alumina were found to have smaller MRRs than their composites, and this behavior was negatively correlated to the materials single-pulse laser ablation threshold. However, under multi-pulse laser irradiation, the ablation thresholds of all materials saturated to the same level, indicating that single phase materials were more sensitive to the incubation effect than their composites. This led to the MRRs of the single phase materials being reduced at larger scan speeds, while the MRRs of their composites remained independent of scan speed. It was also shown that single phase materials were less susceptible to thermal cracking than their composites under excessive heat accumulation. These results suggest that a lower scan speed is preferred for single phase materials in order to achieve a larger MRR, while a higher scan speed is beneficial for the composites for suppressing thermal cracking without compromising ablation efficiency. In addition, no LIPT was detected for zirconia dominated materials after laser ablation.

氧化锆-氧化铝陶瓷的激光纹理是许多应用中很有前景的表面改性方法，例如增强氧化铝增韧氧化锆 (ATZ) 牙科植入物的骨整合或改善氧化锆增韧氧化铝 (ZTA) 髋关节置换轴承组件的摩擦行为。ATZ/ZTA 陶瓷激光纹理化的常见问题是热裂纹、低材料去除率 (MRR) 和激光诱导相变 (LIPT)。此外，这些陶瓷的成分变化会使这些问题复杂化。为了提高制造工艺性，本研究对ATZ/ZTA复合材料的超短脉冲激光烧蚀行为进行了研究。发现单相氧化锆和氧化铝的 MRR 比它们的复合材料小，并且这种行为与材料单脉冲激光烧蚀阈值呈负相关。然而，在多脉冲激光照射下，所有材料的烧蚀阈值饱和到相同水平，表明单相材料比其复合材料对孵化效应更敏感。这导致单相材料的 MRR 在较大的扫描速度下降低，而其复合材料的 MRR 与扫描速度无关。还表明，在过度的热积累下，单相材料比它们的复合材料更不容易热裂。这些结果表明，为了获得更大的 MRR，单相材料优选较低的扫描速度，而更高的扫描速度有利于复合材料在不影响烧蚀效率的情况下抑制热裂纹。此外，激光烧蚀后氧化锆为主的材料没有检测到 LIPT。