کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476298 991149 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crack propagation and residual stress in laminated Si3N4/BN composite structures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Crack propagation and residual stress in laminated Si3N4/BN composite structures
چکیده انگلیسی

The level of residual stress and crack propagation in a new generation of laminates, based on silicon nitride (Si3N4) layer and a mixture of boron nitride (BN) and alumina (Al2O3) interlayer, was presented. The structure consists of alternated concentric rings of Si3N4 separated by the weak BN interlayer possessing no planes of easy crack propagation and fracture resistance much larger than that of any classical planar laminates. The results on direction of crack propagation and residual stress in relation to inter-layer composition, the number of layers, and their thickness are investigated and reported. The effect of residual stress on crack propagation was studied by using Vicksrs intentation. The highest compressive residual stress of ∼170 MPa was found in samples with five layers possessing an average layer thickness of ∼310 × 10−6 m.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issue 9, August 2011, Pages 1841–1847
نویسندگان
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