Martensitic transformation in TiNi alloy after surface modification done by hydroxyapatite layer deposition

被引：3
|
作者：
Goryczka, Tomasz [1 ]
Zubko, Maciej [1 ]
Dudek, Agata [2 ]
机构：
[1] Univ Silesia Katowice, Inst Mat Sci, Ul 75 Pulk Piechoty 1A, PL-41500 Chorzow, Poland
[2] Czestochowa Tech Univ, Inst Mat Engn, Czestochowa, Poland
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2019年 / 35卷 / 03期
关键词：
NiTi alloy; X-ray diffraction; hydroxyapatite; biomaterials; plasma spray coating; martensitic transformation; shape memory alloys; transmission electron microscopy; NITI; PRECIPITATION;
D O I：
10.1080/02670836.2017.1410930
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A hydroxyapatite (HAp) layer was deposited on the surface of an NiTi alloy using a spark plasma technique. The effects of spraying conditions on the martensitic transformation were investigated in three heat-affected zones: the zone under the handle, the transition zone and in a representative zone with HAp coverage. In the representative area, a reduction in the amount of non-transformable phases was observed. A part of the sublayer showed a nanocrystalline or completely amorphous structure. This sublayer was approximately 30 mu m thick. Structural changes contributed to the reduction of the temperature of the reverse martensitic transition down to 25 degrees C. Moreover, modification of the surface revealed a positive influence on the transformation course by narrowing its temperature range and increasing its enthalpy.
引用
收藏
页码：280 / 287
页数：8
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