کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3148283 1197394 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metallurgical Characterization of a New Nickel-Titanium Wire for Rotary Endodontic Instruments
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Metallurgical Characterization of a New Nickel-Titanium Wire for Rotary Endodontic Instruments
چکیده انگلیسی

IntroductionA novel thermomechanical processing procedure has been developed that yields a superelastic (SE) nickel-titanium (NiTi) wire (M-Wire) that laboratory testing shows has improved mechanical properties compared with conventional SE austenitic NiTi wires used for manufacture of rotary instruments. The objective of this study was to determine the origin of the improved mechanical properties.MethodSpecimens from 2 batches of M-Wire prepared under different processing conditions and from 1 batch of standard-processed SE wire for rotary instruments were examined by scanning transmission electron microscopy, temperature-modulated differential scanning calorimetry, micro–x-ray diffraction, and scanning electron microscopy with x-ray energy-dispersive spectrometric analyses.ResultsThe processing for M-Wire yields a microstructure containing martensite, that the proportions of NiTi phases depend on processing conditions, and that the microstructure exhibits pronounced evidence of alloy strengthening.ConclusionsThe presence of Ti2Ni precipitates in both microstructures indicates that M-Wire and the conventional SE wire for rotary instruments are titanium-rich.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Endodontics - Volume 35, Issue 11, November 2009, Pages 1589–1593
نویسندگان
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