Abstract In this study, we investigated the effects of four different acid reagents, sulfuric acid, compound acid, phosphoric acid and Lewis acid-FeCl3, on the depth of Co depletion layer, thermal stability and bending strength of polycrystalline diamond compacts (PDC) at room temperature. The results show that the thermal stability and bending strength of PDC after soaking in different acid corrosion reagents are closely related to the acid-etching effect, especially the depth of Co depletion layer. Sulfuric acid has the best effect of removing cobalt at room temperature. After soaking for 48 h, the depth of Co depletion layer reached 140 um from the surface. Its initial graphitization temperature was 850 °C, and then increased 130 °C with treatment. The bending strength of the PDC was significantly reduced after removing Co from PDC. The larger the depth of Co depletion layer, the lower the bending strength.

中文翻译：

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不同酸蚀剂对PDC室温脱钴效果及性能的影响

摘要 在本研究中，我们研究了硫酸、复合酸、磷酸和路易斯酸-FeCl3 四种不同的酸试剂对多晶金刚石复合片 (PDC) 贫钴层深度、热稳定性和弯曲强度的影响。室内温度。结果表明，PDC在不同酸蚀剂中浸泡后的热稳定性和抗弯强度与酸蚀效果密切相关，尤其是Co耗尽层的深度。硫酸在常温下脱钴效果最好。浸泡 48 小时后，Co 耗尽层距离表面的深度达到 140 um。其初始石墨化温度为 850 ℃，然后随处理升高 130 ℃。从 PDC 中去除 Co 后，PDC 的弯曲强度显着降低。