Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (1): 21-26.DOI: 10.11890/1006-7191-101-21

• 研究论文 • 上一篇    下一篇

Al/Al2O3复合材料伪半固态强韧化成形研究

程远胜   

  1. 哈尔滨工业大学
  • 收稿日期:2009-03-06 修回日期:2009-07-26 出版日期:2010-02-25 发布日期:2010-02-09
  • 通讯作者: 程远胜

Strengthening and toughening forming of Al/Al2O3 composite in pseudo-semi-solid state

Yuansheng CHENG,Shoujing LUO   

  1. School of Materials Science & Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2009-03-06 Revised:2009-07-26 Online:2010-02-25 Published:2010-02-09
  • Contact: Yuansheng CHENG

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摘要：

在粉末成形的基础上，结合金属半固态加工技术提出了金属/陶瓷复合材料伪半固态触变模锻成形工艺，并成功制备出Al/Al2O3复合材料杯形件。微观组织观察及力学性能分析表明制件微观组织致密、力学性能优异。当金属铝体分率为37%时，复合材料制件抗弯强度达570~690MPa，断裂韧性达8.5~16.8 MPa?m1/2，与原位反应及高温氧化工艺相比抗弯强度及断裂韧性大幅度提高。同时分析了成形温度、成形压力等工艺参数对制件的性能的影响。结果证明采用该工艺成形金属/陶瓷复合材料是可行的。

关键词: 伪半固态触变模锻, Al/Al2O3, 抗弯强度；断裂韧性

Abstract:

A new technology—thixo-die-forging of the composite in pseudo-semi-solid state was proposed based on the powder metallurgy technology combing with semi-solid metal process, and the cup shells with Al/Al2O3  composite was prepared successfully. The metallographic analysis and performance test show that the microstructure of parts is dense and mechanical properties are excellent with the volume fraction of Al is 37 %. The bend strength and fracture toughness of the composite are about 570-690 MPa and 8.5-16.8 MPa m1/2, respectively. Comparing with reaction in situ and high temperature oxidation technologies the bending strength and fracture toughness are improved greatly. At the same time, it shows that the technology parameters have great influences on the properties. So it is feasible to prepare metal/ceramics composites by the proposed technology.

Key words: Thixo-die-forging, Pseudo-semi-solid state, Al/Al2O3 , Metal/ceramics composites