کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1585705 1514917 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and characterization of graded impedance impactors for gas gun experiments from tape cast metal powders
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Fabrication and characterization of graded impedance impactors for gas gun experiments from tape cast metal powders
چکیده انگلیسی

Fabrication of compositionally graded structures for use as light-gas gun impactors has been demonstrated using a tape casting technique. Mixtures of metal powders in the Mg–Cu system were cast into a series of tapes with uniform compositions ranging from 100% Mg to 100% Cu. The individual compositions were fabricated into monolithic pellets for characterization by laminating multiple layers together, thermally removing the organics, and hot-pressing to near-full density. The pellets were characterized by optical and scanning electron microscopy, X-ray diffraction, and measurement of density and sound wave velocity. The density and acoustic impedance were observed to vary monotonically (and nearly linearly) with composition. Graded structures were fabricated by stacking layers of different compositions in a sequence calculated to yield a desired acoustic impedance profile. The measured physical properties of the graded structures compare favorably with those predicted from the monolithic pellet characteristics. Fabrication of graded impactors by this technique is of significant interest for providing improved control of the pressure profile and impactor planarity in gas gun experiments.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 427, Issues 1–2, 15 July 2006, Pages 83–91
نویسندگان
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