文章信息/Info

Title:

Progress on Titanium Matrix Composites with Network Microstructure

作者:

 黃陸軍; 耿林

 (哈爾濱工業大學 材料科學與工程學院

Author(s):

 HUANG Lujun;  GENG Lin

 (School of Materials Science and Engineering, Harbin Institute of Technology,

關鍵詞:

鈦基復合材料; 網狀結構; 粉末冶金; 原位自生; 塑性; 強度

DOI:

10.7502/j.issn.1674-3962.2016.09.05

文獻標志碼:

A

摘要:

為填補550-800℃用輕質、耐熱、高強韌、可加工結構材料的空白，以及解決粉末冶金鈦基復合材料脆性大與增強效果差的瓶頸問題，基于構型設計與精確調控，采用低能球磨與熱壓燒結技術，實現了網狀結構鈦基復合材料穩定化制備，較傳統增強相均勻分布鈦基復合材料塑性提高5倍，并具有更高的室溫與高溫增強效果及更強的可設計性，較鈦合金基體使用溫度提高約200℃。有望在550-800℃使用環境下部分替代高溫合金實現減重40%，在航空航天等領域具有廣泛的應用前景而備受關注。綜述網狀結構鈦基復合材料設計與制備、變形與成形、熱處理改性與控制、高溫性能的研究進展，指出已經突破的關鍵問題與仍然存在的問題，提出未來發展方向。結合應用需求，一方面應進一步完善現有復合材料體系、理論與技術，實現其應用解決迫切需求；另一方面，通過多級多尺度構型與工藝設計，開發新一代綜合性能更加優異的鈦基復合材料與改性技術。

Abstract:

In order to fill a gap of structural material used at 550-800 oC possessing low density, high temperature durability, high toughness, processing and deformability, and solve bottleneck problem of high brittleness and low strengthening effect of titanium matrix composites (TMCs) fabricated by powder metallurgy, network structured TMCs were successfully and steadily fabricated by low energy milling and hot pressing sintering technologies, based on architecture design and accurate adjustment. The ductility of the network structured TMCs can be increased by 5 times compared with that of the conventional TMCs with a homogenous microstructure. Moreover, the network structured TMCs exhibited higher strengthening effect at room and high temperatures and possessed designable character. The service temperature can be increased by 200oC compared with that of the monolithic alloy. In other words, the network structured TMCs can be used at 550-800 oC to partially replace high-temperature alloy to get weight loss of 40%. Therefore, they possess extensive application potential in aerospace and got much attention. Recent research progress of design and fabrication, deformation and forming, heat treatment modification and control, high temperature property of the network structured TMCs were reviewed. In addition, the solved key problems and the remained problems were also pointed out, and then the further research directions in future are proposed. Combining with the practical application demand, on the one hand, the present material systems, theory and technology should be further optimized for their practical applications to solve urgent demand; on the other hand, new TMCs and modification technology can be exploited by multi-scale hierarchical design and process design in order to further enhance their combination property.