Preparation of enhanced HA coating on H2O2-treated carbon/carbon composite by induction heating and hydrothermal treatment methods
Preparation of enhanced HA coating on H2O2-treated carbon/carbon composite by induction heating and hydrothermal treatment methods
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DOI：
10.1016/j.matchemphys.2008.09.059
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发表时间：
2009-03
影响因子：
4.6
通讯作者：
Xiong Xin-bo;Zeng Xie-rong;Zou Chun-li
中科院分区：
文献类型：
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作者：
Xiong Xin-bo;Zeng Xie-rong;Zou Chun-li
采用感应加热和水热处理技术在经H_2O_2处理的碳/碳复合材料(HT-C/C)表面涂覆一层羟基磷灰石(HA)涂层。将C/C样品在433K下用2M H_2O_2溶液浸泡在高压罐中进行改性，然后用感应加热的方法在C/C表面包覆一层高锰酸盐晶体。随后，在433K、pH为10的氨水溶液中，在高压釜中进行水热处理，在HT-C/C表面形成羟基磷灰石涂层。用能谱仪、扫描电子显微镜和X射线衍射仪对涂层的成分、结构和形貌进行了分析，并用划痕试验评价了HA涂层的结合强度。结果表明，水热处理前后涂层的表面形貌无明显变化。它们具有相互堆叠的长方形晶体，HA涂层与HT-C/C基板之间形成了牢固的粘接界面。当载荷达到13.12N(即剪应力为61.4 Mpa)时，HTC/C表面的HA涂层才会被刮掉。
An adherent hydroxyapatite (HA) coating was applied onto H2O2-treated carbon/carbon composite (HT–C/C) substrate by induction heating and hydrothermal treatment techniques. Specimens of C/C were initially modified by immersed in an autoclave with 2M H2O2solution at 433K, and then coated with monetite crystals by induction heating method. Subsequently, monetite coating on HT–C/C was converted to HA coating by hydrothermal treatment in an autoclave with the ammonia solution at pH of 10 at 433K. The compositions, structures and morphologies of the coatings on HT–C/C were analyzed by EDS, SEM and XRD, and the adhesive strength of HA coating on HT–C/C was evaluated by a scratch test. The results showed that the coatings of monetite and HA display no significant changes in their morphologies before and after hydrothermal treatment. They have rectangular crystals stacking one another, and a strong adhesive interface has formed between the HA coating and HT–C/C substrate. The HA coating on HT–C/C was not scraped off until the applied load reached 13.12N (i.e., shear stress of 61.4MPa).