Enhanced surface hardness by boron implantation in nitinol alloy

被引：46
作者：
Lee, DH
Park, B
Saxena, A
Serene, TP
机构：
[1] GEORGIA INST TECHNOL,SCH MAT SCI & ENGN,ATLANTA,GA 30332
[2] UNIV CALIF LOS ANGELES,SCH DENT,SECT ENDODONT,LOS ANGELES,CA 90024
来源：
JOURNAL OF ENDODONTICS | 1996年 / 22卷 / 10期
关键词：
D O I：
10.1016/S0099-2399(96)80015-X
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
Boron implantation into Nitinol alloy has a potential for developing improved Nitinol root canal instruments with excellent cutting properties, without affecting their superelastic bulk-mechanical properties. The surface hardness of nickel-titanium (NiTi) alloy, also known as ''Nitinol'' (50 atm% nickel + 50 atm% titanium), has been improved by ion-beam surface modification. With an implantation dose of 4.8 x 10(17) boron/cm(2), a high concentration of boron (30 atm%) is incorporated into NiTi alloy by 110 keV boron ions at room temperature (25 degrees C). Boron-implanted and unimplanted (pure) Nitinol alloys show surface hardness of 7.6 +/- 0.2 and 3.2 +/- 0.2 GPa, respectively, at the nanoindentation depth of 0.05 mu m. The ion-beam-modified NiTi alloy exceeds the surface hardness of stainless steel.
引用
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页码：543 / 546
页数：4
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