锆钛酸铅(PZT)是一种应用广泛具有优良压电性能的功能材料,采用超音速等离子喷涂的方法在45＃钢基体表面制备了PZT陶瓷涂层,采用 X射线衍射(XRD)对烧结粉末和 PZT 涂层相组成进行了检测,利用场发射扫描电子显微镜(SEM)对粉末和喷涂层形貌进行了观察,利用 TEM透射电子显微镜对涂层的微观结构进行了分析,并对涂层的显微硬度以及介电性能进行了测试.结果表明,超音速等离子喷涂制备的 PZT 涂层表面平整,结构致密,孔隙率为1．6％,平均显微硬度为562．3 Hv,居里温度为370℃.
Lead-zirconate-titanate (PZT)was important functional materials which were widely used due to their perfect piezoelectric properties.In this paper,coatings were prepared by supersonic plasma spraying,the micro-structure morphology and phase composition of PZT powder and coating were analyzed by SEM,XRD and TEM,as well as making the experiment of the bonding strength,micro hardness and dielectric property on the coating.The results indicated that the coating have a denser structure and low porosity,the surface of the PZT coating was smooth,characteristics of porosity was 1.6%,the average micro hardness reached 562.3 Hv.The dielectric constant of the coating made by the supersonic plasma spraying was about 370 ℃.
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