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具有原位形成h-BN纳米结构的可加工TiB-BN-C陶瓷的反应烧结

Reaction Sintering of Machinable TiB-BN-C Ceramics with In-Situ Formed h-BN Nanostructure.

作者信息

Popov Oleksii, Shtansky Dmitry V, Vishnyakov Vladimir, Klepko Oleksandra, Polishchuk Sergey, Kutzhanov Magzhan K, Permyakova Elizaveta S, Teselko Petro

机构信息

Faculty of Physics, Taras Shevchenko National University of Kiev, 01033 Kyiv, Ukraine.

Science and Research Centre "Synthesis", 02139 Kiev, Ukraine.

出版信息

Nanomaterials (Basel). 2022 Apr 18;12(8):1379. doi: 10.3390/nano12081379.

DOI:10.3390/nano12081379
PMID:35458088
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9030614/
Abstract

Soft TiB-BN-C hetero-modulus ceramics were sintered with the assistance of in-situ reactions during the hot pressing of TiN-BC precursors. TiB formation was observed already after the hot pressing at 1100 °C, remaining the only phase identifiable by XRD even after sintering at 1500 °C. Analysis of reaction kinetics allows us to assume that the most probable reaction controlling stage is boron atoms sublimation and gas phase transfer from BC to TiN. Reactive sintering route allows almost full densification of TiB-BN-C composite ceramics at 1900 °C. The processes enable the formation of multilayer h-BN nanosheets inside the TiB matrix. The manufactured TiB-33BN-13C ceramic with K = 5.3 MPa·m and H = 1.6 GPa is extremely thermal shock-resistant at least up to quenching temperature differential of 800 °C. The sintered UHTC composite can be machined into complex geometry components.

摘要

在TiN-BC前驱体热压过程中，通过原位反应辅助烧结了软质TiB-BN-C异质模量陶瓷。在1100°C热压后就已观察到TiB的形成，即使在1500°C烧结后，它仍是XRD能识别的唯一相。反应动力学分析使我们能够假设，最可能的反应控制阶段是硼原子升华以及从BC到TiN的气相转移。反应烧结路线使TiB-BN-C复合陶瓷在1900°C时几乎完全致密化。这些过程促使在TiB基体内部形成多层h-BN纳米片。所制备的TiB-33BN-13C陶瓷，其K = 5.3 MPa·m，H = 1.6 GPa，至少在高达800°C的淬火温差下具有极高的抗热震性。烧结后的超高温陶瓷复合材料可加工成复杂几何形状的部件。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/7de82371ab7e/nanomaterials-12-01379-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/73d5259bfc19/nanomaterials-12-01379-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/8ba76d83d162/nanomaterials-12-01379-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/7de82371ab7e/nanomaterials-12-01379-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/59f4c50c47ee/nanomaterials-12-01379-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/5ce0d4a81b1b/nanomaterials-12-01379-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/e8bddb66bc90/nanomaterials-12-01379-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/799b790ffe61/nanomaterials-12-01379-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/42362bac059b/nanomaterials-12-01379-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/1e57360e142b/nanomaterials-12-01379-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/fd40e54265e2/nanomaterials-12-01379-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/73d5259bfc19/nanomaterials-12-01379-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/8ba76d83d162/nanomaterials-12-01379-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fac/9030614/7de82371ab7e/nanomaterials-12-01379-g011.jpg

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本文引用的文献

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ACS Omega. 2022 Jan 7;7(2):2205-2209. doi: 10.1021/acsomega.1c05749. eCollection 2022 Jan 18.
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Theoretical Research on Thermal Shock Resistance of Ultra-High Temperature Ceramics Focusing on the Adjustment of Stress Reduction Factor.聚焦于应力降低系数调整的超高温陶瓷抗热震性理论研究
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