Modification of degradation behavior of magnesium alloy by IBAD coating of calcium phosphate

作者：Yang, J X; Jiao, Y P; Cui, F Z^*; Lee, In Seop; Yin, Q S; Zhang, Y

来源：Surface and Coatings Technology, 2008, 202(22-23): 5733-5736.

DOI：10.1016/j.surfcoat.2008.06.035

• Medical magnesium alloy
• Calcium phosphate coating
• IBAD
• Degradation behavior

In order to modify the degradation behavior of magnesium alloy, hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) coating is formed on magnesium alloy by ion-beam assisted deposition (IBAD) and heat treatment. The morphology, composition and phase structure of the coated samples were investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The width of atomic mixed interface between the coating and substrate formed by IBAD was approximate 3 mu m, which was measured by Auger electron spectroscopy. The hardness and elastic modulus of coating were measured with a depth-sensing nanoindenter system. The results of accelerated test (AT) of degradation indicate that the coatings can decrease degradation rate of original Mg alloy significantly.

• 出版日期2008-8-30
• 单位清华大学; 广州军区广州总医院