Effects of Mo Content on Surface Characteristics of Dental Ni-Ti Alloys

被引：4

作者：

Choe, Han-Cheol ^{[1
]}

Kim, Jae-Un ^{[1
]}

Park, Sun-Kyun ^{[2
]}

机构：

[1] Chosun Univ, Coll Dent, Dept Dent Mat, Gwangju 61452, South Korea

[2] BPC Co, 19-49 Yulchonsandan 1 Ro, Sunchon, Jeonranam Do, South Korea

来源：

CORROSION SCIENCE AND TECHNOLOGY-KOREA | 2023年 / 22卷 / 01期

关键词：

Ni-Ti file; Shape memory alloy; R-phase; Corrosion resistance; Ni-Ti-Mo alloy; MECHANICAL-PROPERTIES; SODIUM-HYPOCHLORITE; FATIGUE RESISTANCE; TITANIUM; IMMERSION;

D O I：

10.14773/cst.2023.22.1.64

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Ni-Ti shape memory alloy for dental nerve treatment devices was prepared by adding Mo to Ni-Ti alloy to improve flexibility and fatigue fracture characteristics and simultaneously increase corrosion resistance. Surface properties of the alloy were evaluated. Microstructure analysis of the Ni-Ti-xMo alloy revealed that the amount of needle-like structure increased with increasing Mo content. The shape of the precipitate showed a pattern in which a long needle-like structure gradually disappeared and changed into a small spherical shape. As a result of XRD analysis of the Ni-Ti-xMo alloy, R-phase structure appeared as Mo was added. R-phase and B2 structure were mainly observed. As a result of DSC analysis, phase transformation of the Ti-Ni-Mo alloy showed a two-step phase change of B2-R-B19' transformation with two exothermic peaks and one endothermic peak. As Mo content increased, R-phase formation temperature gradually decreased. As a result of measuring surface hard-ness of the Ti-Ni-Mo alloy, change in hardness value due to the phase change tended to decrease with increasing Mo content. As a result of the corrosion test, the corrosion potential and pitting potential increased while the cur-rent density tended to decrease with increasing Mo content.

引用

页码：64 / 72

页数：9

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