TiO_2薄膜对金刚石磨料的抗氧化性能及磨削性能的影响

EFFECT OF TiO_2 FILMS ON OXIDATION-RESISTANCE AND WEAR PERFORMANCE OF DIAMOND ABRASIVE

为解决传统电镀工艺在进行金刚石磨料表面改性时所产生的能耗及环境污染问题,采用溶胶-凝胶工艺在金刚石表面涂覆了一层致密的TiO2薄膜。通过扫描电镜、能谱、红外光谱、Raman光谱和综合热分析等手段对涂膜后的金刚石磨料表面形貌、结构和性能进行表征。结果显示:表面涂覆TiO2薄膜的金刚石磨料在空气中开始氧化并发生质量损失的温度为700℃,较未涂膜的金刚石磨料的起始氧化温度提高150℃。用涂TiO2膜金刚石磨料制备的陶瓷结合剂金刚石砂轮,其硬度较未涂膜磨料制备的砂轮提高13%,对硬质合金的摩耗比提高2.2倍。

As a substitute for the traditional electroplating which wastes electricity and causes pollution,TiO2 film coated on diamond abrasive was prepared by the sol-gel method.The morphology,structure and properties of TiO2 film-coated diamond were investigated through scanning electron microscopy,energy dispersive spectroscopy,Fourier transform infrared spectroscopy,Raman spectra and thermogravimetry-differential scanning calorimetry analysis.The results show that the TiO2-coated diamond abrasive can be oxidized ...