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微納米顆粒增強(qiáng)TiAl基復(fù)合材料組織與室溫性能研究
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1.衢州學(xué)院浙江省空氣動(dòng)力裝備技術(shù)重點(diǎn)實(shí)驗(yàn)室;2.西北有色金屬研究院;3.西安稀有金屬材料研究院

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國家自然科學(xué)基金資助(項(xiàng)目號(hào)52001262, 52071188, 52171120),浙江省自然科學(xué)基金資助(ZY22E010293, LQ20E010003)


Microstructure and mechanical properties of micro-nano particles reinforced TiAl composites at room temperature
Author:
Affiliation:

1.Key Laboratory of Air-driven Equipment Technology of Zhejiang Province,Quzhou University;2.Northwest Institute for Nonferrous Metal Research;3.Xi’an Rare Metal Materials Institute Co,Ltd,Xi’an Shaanxi

Fund Project:

National Natural Science Foundation of China [Nos. 52001262, 52071188, 52171120], the Zhejiang Province Natural Science Foundation of China (Grant No.: ZY22E010293, LQ20E010003)

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    摘要:

    原位自生顆粒增強(qiáng)金屬基復(fù)合材料是提高金屬材料強(qiáng)韌性的有效途徑,本文采用放電等離子燒結(jié)技術(shù) (SPS),以氧化石墨烯、碳化硅、氮化硼為增強(qiáng)體,原位自生制備TiAl基復(fù)合材料,研究增強(qiáng)相體對(duì)TiAl基復(fù)合材料顯微組織演變及室溫性能的影響。結(jié)果表明,增強(qiáng)體的改變直接影響了TiAl基復(fù)合材料第二相形貌和分布。添加石墨烯后,在TiAl合金α2和γ片層界面處彌散析出微納米尺度第二相Ti2AlC；添加碳化硅在基體中分別生成微米級(jí)晶界相Ti5Si3，微納米片層間相Ti2AlC；添加氮化硼未能在TiAl合金α2和γ片層界面處析出微納米第二相，而是納米級(jí)TiB2和Ti2AlN相析出在晶界處與基體形成連續(xù)核殼結(jié)構(gòu)；復(fù)合添加石墨烯和氮化硼既能在片層間原位析出Ti2AlC相,又能在晶界處形成核殼結(jié)構(gòu)。TiAl基復(fù)合材料的室溫壓縮性能和摩擦磨損性能均得到有效提高,復(fù)合添加石墨烯和氮化硼可獲得優(yōu)異的室溫性能。TiAl基復(fù)合材料的析出相調(diào)控為合金設(shè)計(jì)提供了新思路,進(jìn)一步突破TiAl合金性能極限。

    Abstract:

    The mixed powders of Ti-48Al-2Nb-2Cr alloy with multilayer graphene oxide, SiC particles and BN nanosheets were sintered by spark plasma sintering (SPS) at 1300 ℃, and the different reinforcement on microstructure evolution and properties of TiAl composites were investigated. The results showed that the microstructure of composites was significantly changed with the addition of different reinforcement. The micro-nano Ti2AlC in-situ precipitated at the interface of α2 lath and γ lath of TiAl matrix after adding graphene. While a microstructure composed of networked core-shell (CS) structured cells can be formed in TiAl matrix with the addition of SiC particles and BN nanoplatelets. Moreover, Ti2AlC can be in situ precipitated and CS structure can be formed by adding graphene and BN nanoplatelets simultaneously. The compressive properties and wear properties of TiAl composites were improved significantly, which showed optimal performance by adding graphene and BN nanoplatelets simultaneously. TiAl composites provided a new idea for alloy designation and broken through the performance limitation of TiAl alloy.

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馬騰飛,王玉鵬,榮光飛,霍望圖,劉承澤,張于勝,王曉紅,董多,朱冬冬.微納米顆粒增強(qiáng)TiAl基復(fù)合材料組織與室溫性能研究[J].稀有金屬材料與工程,2023,52(5):1877~1884.[Ma Tengfei, Wang Yupeng, Rong Guangfei, Huo Wangtu, Liu Chengze, Zhang Yusheng, Wang Xiaohong, Dong Duo, Zhu Dongdong. Microstructure and mechanical properties of micro-nano particles reinforced TiAl composites at room temperature[J]. Rare Metal Materials and Engineering,2023,52(5):1877~1884.]
DOI：10.12442/j. issn.1002-185X.20220380

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  • 收稿日期:2022-05-02
  • 最后修改日期:2022-07-22
  • 錄用日期:2022-08-11
  • 在線發(fā)布日期: 2023-06-08
  • 出版日期: 2023-05-29