کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155975 | 1666369 | 2019 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of carbon fiber needled felt reinforced sol-derived YAG composite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The study concerning the second phase reinforced YAG matrix composites is few although YAG is well known as a desirable thermo structural ceramic. In this paper, low-cost 3D carbon fiber needled felt was used as reinforcement to improve the fracture toughness of YAG, and the carbon fiber needled felt reinforced YAG (C/YAG) composite was fabricated through vacuum impregnation-drying-heat treatment, using the Y2O3-Al2O3 sol with a high solid content as raw material. The microstructure, mechanical properties, thermal stability and oxidation resistance of C/YAG composite were carefully investigated. Due to the characteristics of reinforcement and the microstructure, the as-fabricated C/YAG composite showed non-catastrophic failure behavior and much higher fracture toughness compared with monolithic YAG ceramic. The flexural strength of C/YAG composite was well retained after annealed at 1700â¯Â°C and 1800â¯Â°C under inert atmosphere. Although the chemical inertness between carbon fiber and YAG was confirmed up to 1800â¯Â°C, the physical bonding of interface was enhanced during annealing, which led to the decrease of fracture work, especially at 1800â¯Â°C. The oxidation resistance of C/YAG composite was related to the cracks and pores since YAG is immune to oxidation. The changes of microstructure and flexural strength after oxidation at 1200â¯Â°C, 1400â¯Â°C and 1600â¯Â°C were characterized and analyzed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 772, 25 January 2019, Pages 381-387
Journal: Journal of Alloys and Compounds - Volume 772, 25 January 2019, Pages 381-387
نویسندگان
Borong Shan, Qingsong Ma, Kuanhong Zeng,