Pre-oxidation temperature optimization of ultra-high temperature ceramic components: Flexural strength testing and residual stress analysis

Qu, Zhaoliang; He, Rujie; Wei, Kai; Pei, Yongmao; Fang, Daining

doi:10.1016/j.ceramint.2014.12.079

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…The oxidization of ZrB 2 -SiC ceramics at 1350 o C was silica and zirconia. Boron oxide (B 2 O 3 ) could not be detected due to the large scale evaporation of B 2 O 3 above 1100°C, which is consistent with the results of previous studies [15,16] .…”

Section: Resultssupporting

confidence: 94%

Strengthening of ultra high-temperature ceramics by shot peening and multiple crack healing

2015

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Section: Resultssupporting

confidence: 94%

Strengthening of ultra high-temperature ceramics by shot peening and multiple crack healing

2015

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“…Due to their excellent combined properties of high strength, high hardness, and good chemical inertness, advanced ceramics have received considerable interest and attention for structural applications [ 1 ]. The high hardness and inherent brittleness pose difficulties in machining, which limits the design and application of complex-shaped ceramic components [ 2 ]. Additive manufacturing (AM), as a near-net shape processing approach, produces three-dimensional objects by adding material layer by layer.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Flaw Evolution of Additively Manufactured Al2O3 Ceramic by In Situ X-ray Computed Tomography

et al. 2022

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The additive manufacturing process may create flaws inside ceramic materials. The flaws have a significant influence on the macroscopic mechanical behavior of ceramic materials. In order to reveal the influence of flaws on the mechanical behavior of additively manufactured ceramic, flaw evolution under mechanical loads was studied by in situ X-ray computed tomography (XCT) in this work. In situ compression XCT tests were conducted on stereolithographic additively manufactured Al2O3 ceramic. The three-dimensional full-field morphologies at different compressive loads were obtained. The evolution of flaws, including pores, transverse cracks, and vertical cracks, during compressive loading was observed. The number and volume of pores, transverse cracks, and vertical cracks were extracted. It was found that most pores and transverse cracks tend to be compacted. However, high compressive loads cause vertical cracks near the upper surface to expand, leading to the failure of the specimen. Real flaws with morphological and positional information were introduced into the finite element models. The influence of different types of flaws on the mechanical behavior is discussed. It was found that vertical cracks have a greater influence on mechanical behavior than do transverse cracks under compression. The presence of transverse cracks contributes to the evolution of vertical cracks. This study may be helpful for process optimization and performance enhancement of additively manufactured ceramic materials.

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“…ZrB 2 -20 vol% SiC ultra high temperature ceramics were prepared using hot-pressing at 1950 ℃ for 1 h under a uniaxial pressure of 30 MPa. Detailed fabrication process was reported in our previous study [25][26][27], and typical properties of this UHTC were listed in Table 1.…”

Section: Raw Materialsmentioning

confidence: 99%

Rapid heating thermal shock study of ultra high temperature ceramics using an in situ testing method

Dong

2017

J Adv Ceram

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Abstract:In this paper, the rapid cooling thermal shock behaviors of ZrB 2 -SiC ceramics were measured using traditional water quenching method, and the rapid heating thermal shock behaviors of ZrB 2 -SiC ceramics were investigated using a novel in situ testing method. The measured critical thermal shock temperature difference for rapid cooling thermal shock was 373.6 ℃; however, the critical thermal shock temperature difference for rapid heating thermal shock of ZrB 2 -SiC ceramics was measured to be as high as 1497.2 ℃. The thermal stress distribution states after rapid cooling thermal shock and rapid heating thermal shock testing were analyzed using finite element analysis (FEA) method. The FEA results showed that there is a tensile stress existed on the surface for rapid cooling thermal shock, whereas there is a compressive stress existed on the surface for rapid heating thermal shock. The difference of thermal stress distribution resulted in the difference of the critical temperature difference for rapid cooling thermal shock and rapid heating thermal shock.

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Pre-oxidation temperature optimization of ultra-high temperature ceramic components: Flexural strength testing and residual stress analysis

Cited by 19 publications

References 30 publications

Strengthening of ultra high-temperature ceramics by shot peening and multiple crack healing

Strengthening of ultra high-temperature ceramics by shot peening and multiple crack healing

Investigation on Flaw Evolution of Additively Manufactured Al2O3 Ceramic by In Situ X-ray Computed Tomography

Rapid heating thermal shock study of ultra high temperature ceramics using an in situ testing method

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