In-situ defect repairing in hydroxyapatite/phytic acid hybrid coatings on AZ31 magnesium alloy by hydrothermal treatment

被引：61

作者：

Zhang, Min ^{[1
]}

Cai, Shu ^{[1
]}

Shen, Sibo ^{[1
]}

Xu, Guohua ^{[2
]}

Li, Yan ^{[1
]}

Ling, Rui ^{[1
]}

Wu, Xiaodong ^{[2
]}

机构：

[1] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China

[2] Shanghai Changzheng Hosp, Shanghai 200003, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 658卷

基金：

中国国家自然科学基金;

关键词：

Hydrothermal treatment; Defect repairing; Hybrid coating; Magnesium alloy; Corrosion resistance; CORROSION-RESISTANCE; CONVERSION COATINGS; DEGRADATION BEHAVIOR; VITRO DEGRADATION; TITANIUM SURFACE; HEAT-TREATMENT; CALCIUM; MICROSTRUCTURE; CYTOCOMPATIBILITY; PERFORMANCE;

D O I：

10.1016/j.jallcom.2015.10.282

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

To improve the corrosion resistance of AZ31 magnesium alloy, a crack-free hydroxyapatite/phytic acid (HA/PA) hybrid coating was synthesized on AZ31 substrate via a chemical conversion deposition to form precursor coating, and followed by a hydrothermal treatment in the saturated CaO solution. During the hydrothermal treatment, the phosphate and calcium ions diffused to the interface of the precursor coating/solution to form amorphous CaP compound and subsequently crystallized into HA particles that repaired the defects in the precursor coating and exhibited a high bonding strength of 24.3 +/- 1.7 MPa between the hybrid coating and the magnesium alloy substrate. Electrochemical measurements in simulated body fluid (SBF) revealed that the HA/PA hybrid coating could effectively provide protection for magnesium (Mg) alloy on account of the stable barrier properties. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：649 / 656

页数：8

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