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Manufacture of multilayer ceramic structures from continuous filaments of different compositions

A multi-layer ceramic and continuous fiber technology, which is applied in the direction of ceramic layered products, layered products, antennas, etc., can solve the problems of micro-cracks and layers, hindering the progress of manufacturing ceramic broadband radomes, and avoiding low productivity. Effect

Pending Publication Date: 2022-03-01
ASELSAN ELEKTRONIK SANAYI & TICARET ANONIM SIRKETI
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Problems solved by technology

[0009] Based on the above information and our experience, the factors hindering the progress of ceramic broadband radome manufacturing are the brittle nature of the ceramic material and the CTE (coefficient of thermal expansion) mismatch between the individual ceramic layers of the multilayer structure, resulting in Microcracks and Delamination

Method used

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  • Manufacture of multilayer ceramic structures from continuous filaments of different compositions
  • Manufacture of multilayer ceramic structures from continuous filaments of different compositions
  • Manufacture of multilayer ceramic structures from continuous filaments of different compositions

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Embodiment Construction

[0027] Fiber-reinforced ceramic matrix composites (FR-CMCs) are advanced and customizable materials with improved toughness and damage tolerance compared to bulk ceramics [6]. Broadly speaking, reinforcing fibers can be divided into inorganic fibers and organic fibers [4]. Inorganic fibers can be further divided into non-metal fibers and metal fibers, while organic fibers are mainly carbon fibers and polymer fibers. Ceramic fibers belong to the same family of non-metallic inorganic fibers as glass / mineral and single crystal fibers [4].

[0028] Fiber material selection for CMC applications is critical. Temperatures on the radome material are known to be as high as 1,000°C during high Mach number flight, limiting the choice of fiber material. Polymers and glass fibers have degradation temperatures of 500 °C and 700 °C, respectively, which limits their effective use in CMCs at higher temperatures [6]. Therefore, ceramic fibers are a right choice to support high-performance CM...

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Abstract

The present invention is a method of making a multilayer RF transparent structure by constructing a plurality of ceramic layers by winding continuous ceramic filaments of different compositions. In the method, different continuous ceramic filaments are braided to construct layers having a specific dielectric constant and braid count / thickness. Layers having the same or different dielectric properties form an interlayer design to meet the desired mechanical, thermal and electrical requirements.

Description

technical field [0001] The present invention is a method of fabricating multiple ceramic layers by winding continuous ceramic filaments of different compositions to produce multilayer radio frequency (RF) transparent structures. Background technique [0002] Advanced radar systems in hypersonic missiles impact the materials and production techniques used in traditional radome technology. The need to efficiently and quickly detect multiple targets by radar while withstanding high temperatures, thermomechanical loads, and harsh environmental factors challenges the development of high-end missile radomes. [0003] Fiber-reinforced ceramic matrix composites (FR-CMCs) are a promising solution to most of the above-mentioned problems. These composites are fabricated by using filaments such as fibers to make 2D (woven, weft-knitted, braided, warp-knitted) or 3D (3D woven, 3D spaced) fabrics [1,2], which are then impregnated by ceramic suspensions. Depending on the application, cer...

Claims

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Application Information

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IPC IPC(8): H01Q1/42C04B35/00
CPCH01Q1/422C04B35/80C04B35/111C04B35/565C04B35/14C04B2235/5224C04B2235/5232C04B2235/5252C04B2235/5256C04B2235/616C04B2235/483C04B35/571B32B18/00C04B2237/38C04B2237/584C04B35/10C04B41/4584C04B41/5025C04B41/87C04B2235/3217C04B2235/3418C04B2235/3826H01Q1/425
Inventor 汉苏·比罗尔穆罕默德·埃里姆·伊娜尔阿金·达基里奇塞伯尼·萨吉纳厄兹古尔·拜勒穆斯塔法·法提赫·阿科波斯坦奇
Owner ASELSAN ELEKTRONIK SANAYI & TICARET ANONIM SIRKETI
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