کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449361 988700 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of the mechanisms of reactive sintering and combustion synthesis of NiTi using differential scanning calorimetry and microstructural analysis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Investigation of the mechanisms of reactive sintering and combustion synthesis of NiTi using differential scanning calorimetry and microstructural analysis
چکیده انگلیسی

The mechanisms of reactive sintering in a Ni + Ti powder compact were investigated using differential scanning calorimetry and microstructural analysis. Heating these mixtures up to 900 °C involves the slow growth of the three intermetallic compounds and the transformation of α- to β-Ti followed by its rapid saturation with Ni. When samples were heated above 942 °C a thermal explosion (TE) mode of self-propagating high-temperature synthesis (SHS) was ignited by the melting of the (β-Ti) solid solution at 944 °C. Increasing hold time at 900 °C prior to SHS decreased the volume fraction of (β-Ti) in the powder compact and reduced the magnitude of combustion. The amount of (β-Ti) was quantitatively determined using DSC and found to decay according to a two-stage parabolic law. In addition, the magnitude of the exothermic reaction occurring during SHS was found to decrease linearly with a decrease in the volume fraction of (β-Ti) developed at 900 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 3, February 2008, Pages 559–570
نویسندگان
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