Effect of gadolinia–stabilized zirconia nanoparticles manufactured from Mist CVD on the mechanical properties of ceramics sintered by SPS

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materialia Pub Date : 2024-08-24 DOI:10.1016/j.mtla.2024.102216
Rong Tu , Xiangyu Chen , Yingqiu Zheng , Chao Song , Xiaoping Guo , Meijun Yang , Guoqiang Luo , Song Zhang , Takashi Goto
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Abstract

Zirconia is an engineering ceramic material with excellent comprehensive properties. However, it suffers from the inherent disadvantage of low fracture toughness. To improve its fracture toughness, Gd2O3 is an effective stabilizer. In the present study, Gd2O3–ZrO2 composite powders were synthesized using the Mist CVD method. Following synthesis, these powders were pressed through spark plasma sintering. The crystallinity of the Gd2O3–ZrO2 powders improved as the deposition temperature increased from 600°C to 900°C. The tetragonality (c/2a) of the Gd–TZP composites increased from 0.99941 to 1.01571 as the Gd2O3 content increased from 2 mol% to 4 mol%, but it decreased when the content reached 5 mol%. The Gd2O3–ZrO2 nanoparticles produced via the Mist CVD approach presented a unique hollow spherical structure. Under moist chemical vapor deposition (CVD) conditions with 4 mol% Gd2O3 at 1400°C, the Gd–TZP composites exhibited fracture toughness and hardness values of approximately 12.03 ± 0.15 MPa·m1/2 and 12.16 ± 0.17 GPa, respectively.

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雾状 CVD 制造的钆稳定氧化锆纳米粒子对 SPS 烧结陶瓷机械性能的影响
氧化锆是一种工程陶瓷材料,具有优异的综合性能。然而,它也存在断裂韧性低的固有缺点。为了提高其断裂韧性,Gd2O3 是一种有效的稳定剂。本研究采用喷雾 CVD 法合成了 Gd2O3-ZrO2 复合粉末。合成后,这些粉末通过火花等离子烧结进行压制。随着沉积温度从 600°C 升至 900°C,Gd2O3-ZrO2 粉末的结晶度有所提高。随着 Gd2O3 含量从 2 摩尔%增加到 4 摩尔%,Gd-TZP 复合材料的四方性(c/2a)从 0.99941 增加到 1.01571,但当含量达到 5 摩尔%时,四方性有所下降。通过雾化化学气相沉积法制备的 Gd2O3-ZrO2 纳米粒子呈现出独特的中空球形结构。在湿化学气相沉积(CVD)条件下,Gd2O3 的含量为 4 mol%,温度为 1400°C,Gd-TZP 复合材料的断裂韧性和硬度值分别约为 12.03 ± 0.15 MPa-m1/2 和 12.16 ± 0.17 GPa。
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来源期刊
Materialia
Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
6.40
自引率
2.90%
发文量
345
审稿时长
36 days
期刊介绍: Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).
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