کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5459461 1516176 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ Raman spectroscopy study of thermal mismatch stress and negative thermal expansion behaviours of ZrW2O8 in ZrW2O8/Al composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
In-situ Raman spectroscopy study of thermal mismatch stress and negative thermal expansion behaviours of ZrW2O8 in ZrW2O8/Al composite
چکیده انگلیسی


- Effective heat treatment temperature can be got from temperature dependent Raman spectra.
- The Raman bands of ZrW2O8 will suffer frequency shift under thermal stress and different bands show diverse trends.
- The Raman frequency shift can be estimated and in good agreement with experimental results.
- We establish a novel method to measure NTE materials' CTE by measuring Raman frequency shift and Grüneisen parameter.

Negative thermal expansion materials with open frame structure were easy to undergo phase transformation under high thermal mismatch stress. In this work, a large amount of γ-phase was found in ZrW2O8/Al composite, presenting great fluctuations. Based on the temperature-dependent Raman spectroscopy and theoretical calculation, the accurate heat-treatment temperature was used to eliminate γ-phase and low thermal expansion composite without abnormal expansion was obtained. The Raman frequency shift caused by the thermal stress was quantitatively analyzed. The negative thermal expansion material's thermal expansion was estimated with Raman peak shift.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 718, 25 September 2017, Pages 356-360
نویسندگان
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