Size effect of carbon fiber-reinforced silicon carbide composites (C/C-SiC): Part 2 - tensile testing with alignment device

Flauder, Stefan; Bombarda, Ilaria; D’Ambrosio, Roberto; Langhof, Nico; Lazzeri, Andrea; Krenkel, Walter; Schafföner, Stefan

doi:10.1016/j.jeurceramsoc.2021.11.044

Cited by 10 publications

(3 citation statements)

References 39 publications

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“…This dichotomy between the promise of 3D printing and its current limitations underscores the critical importance of comprehending the size effect. This becomes especially relevant when considering that numerous materials, ranging from silicon carbide (SiC) ceramics [11] to sea ice [12], composites [13], steel [14], vinyl foam [15], concrete [16], rock [17], lime [18], and an array of polymers [19], exhibit characteristics that are contingent on size. This phenomenon poses a formidable challenge to the scientific community, emphasizing the pressing need for systematic investigations into size effects in additively manufactured polymers.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Size on the Mechanical Properties of 3D-Printed Polymers

Sadaghian,

Dadmand,

Pourbaba

et al. 2023

Sustainability

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Most of the experiments on additively manufactured polymers are on a small scale, and it remains uncertain whether findings at a small scale can be extrapolated to their larger-scale counterparts. This uncertainty mainly arises due to the limited studies on the effect of size on three-dimensional (3D)-printed polymers, among many others. Given this background, this preliminary study aims to investigate the effect of geometric dimensions (i.e., the size effect) on the mechanical performance of four representative types of 3D-printable polymers, namely, (1) polycarbonate acrylonitrile butadiene styrene (PC/ABS), (2) acrylonitrile-styrene-acrylate (ASA), (3) polylactic acid (PLA) as a bio biodegradable and sustainable material, and (4) polyamide (PA, nylon), based on compression, modulus of elasticity, tension, and flexural tests. Eight different sizes were investigated for compression, modulus of elasticity, and tension tests, while seven different sizes were tested under flexure as per relevant test standards. A material extrusion technique was used to 3D-print the polymers in a flat build orientation and at an infill orientation angle of 45°. The results have shown that the mechanical properties of the 3D-printed polymers were size-dependent, regardless of the material type, with the most significant being flexure, followed by tension, compression, and modulus of elasticity; however, no clear general trend could be identified in this regard. All the materials except for nylon showed a brittle failure pattern, characterized by interfacial failure rather than filament failure. PLA outperformed the other three polymer specimens in terms of strength, irrespective of the type of loading.

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Section: Introductionmentioning

confidence: 99%

The Effect of Size on the Mechanical Properties of 3D-Printed Polymers

Sadaghian,

Dadmand,

Pourbaba

et al. 2023

Sustainability

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“…1 C f /C, SiC f /C, and C f /SiC have been considered to replace alloys owing to their high melting points (>2700 • C), low density, and high strength. [23][24][25][26][27][28] However, C and SiC tend to oxidize to form CO 2 and SiO 2 , respectively, in environments containing high-temperature air, preventing the direct application of CMCs in aviation and gas turbine engines. To protect CMCs from damage caused by hightemperature air or steam, environmental barrier coatings (EBCs) have been proposed, which delay their oxidization and thus lower the probability of their failure.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the working temperature is limited to approximately 1150°C for Ni‐based alloys, in which TBCs with a thickness of approximately 300–500 μm can provide a temperature gradient of 50–150°C under the effects of cooling air 1,16,17,19–22 . Ceramic matrix composites (CMCs), such as SiC f /SiC (where the subscript f represents fibers), C f /C, SiC f /C, and C f /SiC have been considered to replace alloys owing to their high melting points (>2700°C), low density, and high strength 23–28 . However, C and SiC tend to oxidize to form CO 2 and SiO 2 , respectively, in environments containing high‐temperature air, preventing the direct application of CMCs in aviation and gas turbine engines.…”

Section: Introductionmentioning

confidence: 99%

Ferroelastic rare‐earth tantalates for multifunctional thermal/environmental barrier coatings: A perspective

Chen,

Wang,

Zhang

et al. 2023

J Am Ceram Soc.

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This perspective outlines the research directions of ferroelastic rare‐earth (RE) tantalates (RETaO4), which have been studied as multifunctional thermal/environmental barrier coatings (T/EBCs) with working temperatures above 1600°C. Ferroelastic RETaO4 ceramics exhibit several distinct features, including the reversible second‐order ferroelastic phase transition, high toughness, low thermal conductivity, low oxygen ion conductivity, and adjustable thermal expansion coefficients. This perspective provides a concise summary of the research progress on tantalate coatings synthesized via air plasma spraying and electron beam physical vapor deposition. The service performance of tantalate coatings is typically evaluated through thermal fatigue and shock measurements. Uncovering the failure mechanisms and understanding influencing factors are key aspects for future studies. In this regard, establishing the synthesis‐structure‐property relationship of RETaO4 coatings is essential. This brief perspective can serve as a guide for future work on RETaO4 coatings and further advancements in their applications across various fields, including aviation engines and gas turbines.This article is protected by copyright. All rights reserved

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