文章信息/Info

Title:

Effect of Liquid Silicone Resin on the Properties of Al2O3 Based Ceramic Core

文章編號:

1674-3962(2021)07-0535-07

作者:

楊志彬1; 張陽1; 蒲發源1; 馮浩1; 康婷1; 賈文銳1; 余建波2

（1. 江蘇科技大學冶金與材料工程學院，江蘇 張家港 215600）（2. 上海大學材料科學與工程學院 省部共建高品質特殊鋼冶金與制備國家重點實驗室，上海 200072）

Author(s):

YANG Zhibin1;  ZHANG Yang1;  PU Fayuan1;  FENG Hao1;  KANG Ting1;  JIA Wenrui1;  YU Jianbo2

(1. School of Metallurgy and Materials Engineering, Jiangsu University of Science and Technology, Zhangjiagang 215600, China) (2. State Key Laboratory of Advanced Special Steels, Department of Material Science and Engineering, Shanghai University, Shanghai 200072, China)

關鍵詞:

液態硅樹脂; 氧化鋁; 陶瓷型芯; 抗彎強度; 線性收縮率

Keywords:

liquid silicone resin;  Al2O3;  ceramic core;  bending strength;  length shrinkage

分類號:

TQ174

DOI:

10.7502/j.issn.1674-3962.202002013

文獻標志碼:

A

摘要:

航空發動機上的葉片是航空發動機的“心臟”部件，葉片性能的好壞對航空發動機的性能起決定性作用。高性能空心葉片的制備對生產綜合性能高的陶瓷型芯提出了更高的要求。以球形氧化鋁粉末為基體材料，液態硅樹脂為粘結劑，利用干壓法制備陶瓷型芯素坯并使用管式電爐在空氣氣氛中燒結。系統研究了不同燒結溫度和液態硅樹脂含量對陶瓷型芯相組成、顯微組織和燒結性能的影響。結果表明，添加液態硅樹脂對陶瓷型芯抗彎強度、線性收縮率、顯氣孔率和體積密度影響顯著。相同燒結溫度下，陶瓷型芯樣品線性收縮率和抗彎強度隨液態硅樹脂量的增大而增大，而顯氣孔率和體積密度則相應減小。當液態硅樹脂質量分數為0.8%時，陶瓷型芯顯氣孔率和體積密度變化最為穩定，線性收縮率也能保證良好的尺寸精度；當燒結溫度為1550 ℃時，抗彎強度達到最大值50.76 MPa。

Abstract:

The blades on an aero engine are the “heart” components of an aero engine. The properties of the blades plays a decisive role in the performance of the aero engine. The preparation of high-performance hollow blades puts forward higher requirements for the production of ceramic cores with high comprehensive performance.With ball�瞫haped Al2O3 powders as the matrix and liquid silicone resin as the precursor, the Al2O3-based ceramic core biscuits were prepared by dry pressing method and sintered in air atmosphere by tube electric furnace.Effects of silicone resin content and sintering temperature on phase composition, microstructure and properties of the Al2O3-based ceramic cores were investigated. The results showed that the effect of liquid silicone resin on the bulk density, apparent porosity and bending strength is significant. As the content of liquid silicone resin increases, the length shrinkage and bending strength increase while the bulk density and apparent porosity decrease. When the content of liquid silicone resin is 0.8wt%, the change of apparent porosity and bulk density of ceramic core is the most stable, and the length shrinkage can also ensure good dimensional accuracy. At the same time, the bending strength reaches the maximum value of 50.76 MPa at the sintering temperature of 1550 ℃.