等离子体预处理的炭/炭复合材料等离子喷涂制备羟基磷灰石涂层

Properties of plasma-spray coated hydroxyapatite on carbon/carbon composites pretreated by an argon plasma

为了提高等离子喷涂法所制羟基磷灰石涂层与炭/炭复合材料的结合力,采用氩气等离子体预处理结合等离子体喷涂法在炭/炭基体表面制备羟基磷灰石涂层,采用扫描电镜、X射线衍射仪、红外光谱仪、划痕仪等研究羟基磷灰石涂层的形貌、相组成以及羟基磷灰石涂层与基体的结合力。结果表明:采用或不采用等离子体处理炭/炭复合材料,羟基磷灰石涂层形貌和相组成接近,羟基磷灰石涂层的临界载荷分别为14.0 N、8.9 N,前者比后者临界载荷提高了57.3%。采用等离子体处理可提高等离子体喷涂羟基磷灰石涂层与炭/炭复合材料基体的结合力。

Carbon/carbon composites pretreated by an argon plasma were coated by hydroxyapafite （HA） using a plasma spraying method. The morphology, the compositions of the coating and bond strength between HA and substrate were investigated by scan- ning electron microscopy, X-ray diffraction, infrared spectrometry and a scratching test. Results indicate that although the morpholo- gy and phase compositions of the HA coating are similar, the substrate critical load, above which apparent spallation of the coating occurs, was 14.0 and 8.9 N with or without the pretreatment respectively, indicating that the argon plasma pretreatment improves the bond strength between the coating and the Substrate.