Converting ultrasonic induction heating deposited monetite coating to Na-doped HA coating on H2O2-treated C/C composites by a two-step hydrothermal method

被引：10
作者：
Xiong Xin-bo [1 ]
Hung Jian-feng [2 ]
Zeng Xie-rong [1 ]
Chu Cen-cen [1 ]
机构：
[1] Shenzhen Univ, Dept Mat Sci & Engineer, Shenzhen 518086, Peoples R China
[2] Shaanxi Univ Sci & Technol, Minist Educ, Xian 710021, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Carbon/carbon composites; Hyroxyapatite; Coating; Induction heating deposition; HYDROXYAPATITE; STOICHIOMETRY; HYDROLYSIS;
D O I：
10.1016/j.apsusc.2011.06.066
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
a monetite coating on H2O2-treated C/C composites was prepared by ultrasonic induction heating (UIH) technology. Subsequently, this coating was subjected to an ammonia hydrothermal treatment to form a undoped hydroxyapatite (U-HA) coating. Finally, the as-prepared U-HA coating was placed in a NaOH solution and hydrothermally treated to produce the other hydroxyapatite (Na-HA) coating. The structure, morphology and chemical composition of the two HA coatings were characterized by XRD, FTIR, SEM and EDS, the adhesiveness and local mechanical properties, e. g. nanohardness and Young's modulus of the two HA coatings to C/C composites was evaluated by a scratch test and nanoindentation technique respectively. The results showed that the two HA coatings had the alike morphology and crystallization. But, compared with the U-HA coating, the Na-HA coating was doped with Na ions, and gave a Ca/P ratio close to a stoichiometric hydroxyapatite, and thus showed a higher nano-indentation value, Young's modulus, and larger bonding strength. These results verified the strengthened effect of Na ion in hydroxyapatite coating on carbon/carbon (C/C) composities. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：10346 / 10350
页数：5
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