Improved 3D printed silica ceramics impregnated with an alumina sol by controlling atmosphere, vacuum pressure and holding time

被引：0

作者：

Li, He ^{[1
,2
]}

Huang, Yunzhi ^{[1
,2
]}

Colombo, Paolo ^{[3
]}

机构：

[1] Xinjiang Univ, Xinjiang Environm & Funct Mat Engn Res Ctr, Sch Mat Sci & Engn, Urumqi 830046, Xinjiang, Peoples R China

[2] Xinjiang Univ, Sch Phys Sci & Technol, Xinjiang Key Lab Solid State Phys & Devices, Urumqi 830046, Xinjiang, Peoples R China

[3] Univ Padua, Dept Ind Engn, I-35131 Padua, Italy

来源：

CERAMICS INTERNATIONAL | 2025年 / 51卷 / 05期

关键词：

Silica ceramics; Vacuum impregnation; Alumina sol; Additive manufacturing; Cristobalite; CRISTOBALITE CRYSTALLIZATION; INFILTRATION; CORES; COMPOSITES;

D O I：

10.1016/j.ceramint.2024.12.077

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

When the content of cristobalite is in the appropriate range, the mechanical properties of silica ceramics can be improved. The formation and growth of cristobalite in silica ceramics can be promoted by introducing alumina into silica ceramics by vacuum impregnation. In this study, the influence of different conditions on the impregnation of silica ceramics by alumina sol was studied by controlling the impregnation atmosphere, vacuum impregnation pressure and vacuum impregnation time. The results proved that the impregnation atmosphere has a great influence on the impregnation effect. The flexural strength of vacuum impregnated sample increased by 278.8 % compared with that of air impregnated sample. The smaller the pressure, the greater the difference between the pressure and the external pressure, and the better the impregnation effect of the sample. The flexural strength of the sample with vacuum impregnation pressure of 0.015 MPa was 138.1 % higher than that of the sample with vacuum impregnation pressure of 0.065 MPa. The increase of vacuum impregnation holding time can improve the performance of the sample, but the improvement effect has an upper limit. When the vacuum impregnation time was 3.0 h, the strength of the sample improved by 98.3 % compared with that of the sample with vacuum impregnation time of 1.5 h. Based on the mechanical properties and economic benefits, the best mechanical properties of silica ceramics were obtained by impregnating 3.0 h with 25 wt% alumina sol at a temperature of 60 degrees C and a vacuum pressure of 0.015 MPa. In these conditions, the flexural strength of the samples was 19.9 +/- 0.4 MPa, the bulk density was 1.68 +/- 0.02 g/cm3, and the porosity was 25.9 +/- 0.9 %.

引用

页码：6309 / 6318

页数：10

共 52 条

[1]

Lu Z., Cao J.W., Jing H., Et al., Review of main manufacturing processes of complex hollow turbine blades, Virtual Phys. Prototyp., 8, 2, pp. 87-95, (2013)

[2]

Pan Z., Lu B., Guo J., Et al., Microstructures and properties of silica-based ceramic cores reinforced by alumina sol-modified fused-silica fibers, Ceram. Int., 50, 7, pp. 10602-10608, (2024)

[3]

Xu Z., Zhong J., Su X., Et al., Experimental study on mechanical properties of silica-based ceramic core for directional solidification of single crystal superalloy, Ceram. Int., 44, 1, pp. 394-401, (2018)

[4]

Gromada M., Swieca A., Kostecki M., Et al., Ceramic cores for turbine blades via injection moulding, J. Mater. Process. Technol., 220, pp. 107-112, (2015)

[5]

Zhai X., Chen J., Su R., Et al., Vat photopolymerization 3D printing of Al<sub>2</sub>O<sub>3</sub>ceramic cores with strip‐shaped pores by using polyamide 6 fiber template, J. Am. Ceram. Soc., 107, 8, pp. 5400-5411, (2024)

[6]

Li H., Elsayed H., Colombo P., Effect of particle size distribution and printing parameters on alumina ceramics prepared by Additive Manufacturing, Ceram. Int., 50, 4, pp. 6340-6348, (2024)

[7]

Li H., Elsayed H., Colombo P., Enhanced mechanical properties of 3D printed alumina ceramics by using sintering aids, Ceram. Int., 49, 15, pp. 24960-24971, (2023)

[8]

Sachs E.M., Haggerty J.S., Cima M.J., Et al., Three-dimensional Printing techniques[Z]. CA, 1994, (1994)

[9]

Li H., Liu Y., Liu Y., Et al., Effect of debinding temperature under an argon atmosphere on the microstructure and properties of 3D-printed alumina ceramics, Mater. Char., 168, (2020)

[10]

Lu J., Zhang X., Li S., Et al., Quasi-static compressive and cyclic dynamic impact performances of vat photopolymerization 3D printed Al2O3 triply periodic minimal surface scaffolds and Al2O3/Al hybrid structures: effects of cell size, J. Alloys Compd., 969, (2023)

← 1 2 3 4 5 6 →