电场辅助动态热锻制备超高韧3YSZ陶瓷

张渤涛; 姚曙; 范建业; 赵科; 刘金铃; 刘佃光

doi:10.19976/j.cnki.43-1448/TF.2024032

粉末冶金材料科学与工程 >

2024 , Vol. 29 >Issue 4: 290 - 297

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2024032

工艺技术

电场辅助动态热锻制备超高韧3YSZ陶瓷

张渤涛 ,
姚曙 ,
范建业 ,
赵科 ,
刘金铃 ,
刘佃光

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1.西南交通大学材料科学与工程学院,成都 610031;
2.西南交通大学力学与航空航天学院,成都 611756

收稿日期: 2024-04-04

修回日期: 2024-06-14

网络出版日期: 2024-09-30

基金资助

国家自然科学基金面上项目(52272074,52072201,52072312); 四川省科技计划杰青培育项目(2021JDJQ0019); 中南大学粉末冶金国家重点实验室开放课题(SKLPM-KF-06); 中央高校基本科研业务费专项资金(2682024GF011,2682024GF016); 河南省航空材料与应用技术重点实验室开放基金(ZHKF-230102,ZHKF-230114)

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Electric field assisted dynamic hot forging preparation of 3YSZ ceramic with ultrahigh toughness

ZHANG Botao ,
YAO Shu ,
FAN Jianye ,
ZHAO Ke ,
LIU Jinling ,
LIU Dianguang

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1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, China

Received date: 2024-04-04

Revised date: 2024-06-14

Online published: 2024-09-30

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摘要

易脆这一固有特性极大限制了高性能陶瓷材料在工业领域的广泛应用。本文通过电场辅助动态热锻制备超高韧3YSZ陶瓷,研究在电场和动态力场耦合作用下3YSZ陶瓷的微结构演化和力学性能。结果表明：在1 000 ℃的恒定炉温、20 V/cm的电场强度、140 mA/mm²的电流密度和(50±10) MPa的动态压力下热锻10 min后,3YSZ陶瓷的维氏硬度和断裂韧性分别达到了(12.40±0.58) GPa和(10.69±0.33) MPa·m^1/2,相较传统烧结陶瓷分别提高了11.5%和54.9%。韧性的显著提升主要是由于电场辅助动态热锻降低了3YSZ陶瓷中四方相的稳定性,使其在外力诱导时更易发生相变,从而有效抑制裂纹的扩展。电场辅助动态热锻技术具有无需添加增强相和增韧效果显著的优势,为高性能3YSZ陶瓷材料的增韧提供了新路径。

关键词： 电场; 动态热锻; 氧化锆; 韧性; 相变增韧

本文引用格式

张渤涛 , 姚曙 , 范建业 , 赵科 , 刘金铃 , 刘佃光 . 电场辅助动态热锻制备超高韧3YSZ陶瓷[J]. 粉末冶金材料科学与工程, 2024 , 29(4) : 290 -297 . DOI: 10.19976/j.cnki.43-1448/TF.2024032

Abstract

The inherent brittleness greatly limits the wide application of high performance ceramic materials in the industrial field. In this paper, ultrahigh toughness 3YSZ ceramics were prepared by electric field assisted dynamic hot forging. The microstructure evolution and mechanical properties of 3YSZ ceramics under the coupling of electric field and dynamic force field were studied. The results show that: under the conditions hot forging for 10 min at a constant furnace temperature of 1 000 ℃, electric field strength of 20 V/cm, current density of 140 mA/mm², and dynamic pressure of (50±10) MPa, the Vickers hardness and fracture toughness of 3YSZ ceramic reache (12.40±0.58) GPa and (10.69±0.33) MPa·m^1/2, respectively, which increase 11.5% and 54.9% compared with the conventional sintered ceramic. The remarkable improvement of toughness mainly due to the stability of the tetragonal phase in 3YSZ ceramics reduced by electric field assisted dynamic hot forging, which makes it easier to undergo phase transformation when induced by external force, so as to effectively inhibit crack propagation. Electric field assisted dynamic hot forging technology has the advantages of no need to add reinforcement phase and remarkable toughening effect, which provides a new path for toughening high performance 3YSZ ceramic materials.

Key words： electric field; dynamic hot forging; zirconia; toughness; transformation toughening

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