Nanocrystalline Hydroxyapatite/Si Coating by Mechanical Alloying Technique
Nanocrystalline Hydroxyapatite/Si Coating by Mechanical Alloying Technique
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DOI：
10.1155/2012/390104
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发表时间：
2012-01-01
影响因子：
3.8
通讯作者：
Mansurov, Zulkhair A.
中科院分区：
文献类型：
--
作者：
Hannora, Ahmed E.;Mukasyan, Alexander S.;Mansurov, Zulkhair A.
提出了一种利用机械合金化技术在钛基上沉积羟基磷灰石（HA）薄膜的新方法。然而，研究表明，在800℃下对这种机械包覆的HA层进行1小时热处理会导致所需HA相部分转变为β -三磷酸钙（β - tcp）相。MA过程中形成的晶界和界面缺陷促进了这一转变。发现硅掺杂羟基磷灰石阻碍了这一相变过程。在900℃热处理后，si掺杂的透明质酸也未发生β - tcp相变或分解。
A novel approach for depositing hydroxyapatite (HA) films on titanium substrates by using mechanical alloying (MA) technique has been developed. However, it was shown that one-hour heat treatment at 800 degrees C of such mechanically coated HA layer leads to partial transformation of desired HA phase to beta-tri-calcium phosphate (beta-TCP) phase. It appears that the grain boundary and interface defects formed during MA promote this transformation. It was discovered that doping HA by silicon results in hindering this phase transformation process. The Si-doped HA does not show phase transition to beta-TCP or decomposition after heat treatment even at 900 degrees C.