کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438642 1398186 2017 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of high temperature cycling on both crack formation in ceramics and delamination of copper layers in silicon nitride active metal brazing substrates
ترجمه فارسی عنوان
اثر دوچرخه سواری با دمای بالا بر روی هر دو شکل ترک در سرامیک و خواص لایه های مس در بسترهای فلزی ریخته گری فعال نیترید سیلیکون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Crack formation in Si3N4 active metal brazing (AMB) ceramic substrates and delamination of copper layers on the AMB substrates subjected to temperature cycling from −40 to 250 °C were investigated to evaluate the reliability of these substrates under harsh environments. Acoustic scanning microscopy (ASM) observation of the Si3N4 substrates with 0.30 mm thick Cu layers revealed crack formation beneath the corner of the copper plate after 100 cycles, whereas no cracks were detected on the Si3N4 substrate with a 0.15 mm thick Cu layer, even after 1000 cycles. The residual bending strength of the Si3N4 substrates with 0.30 mm thick Cu layers was 78% of the as-received substrate after 10 thermal cycles, and gradually decreased with an increase in the number of thermal cycles until ca. 65% of the initial strength after 1000 cycles. The Si3N4 substrates with 0.15 mm thick Cu layers exhibited a gentler degradation of residual strength than those with 0.30 mm thick Cu layers. In contrast, the residual bending strength of AlN-AMB substrates with 0.15 mm or 0.30 mm thick Cu layers were reduced by 50% within only 10 thermal cycles. The depth of cracks developed during the thermal cycles was measured from the fractured surface of the Si3N4-AMB and AlN-AMB substrates. The crack-growth rate in the Si3N4-AMB substrates was much slower than that in the AlN-AMB substrates, which could account for the different degradation behavior of the residual bending strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 6, 15 April 2017, Pages 5080-5088
نویسندگان
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