Microstructure development of Y-Ti-O dispersion strengthened Cu alloys fabricated by mechanical alloying

被引：7

作者：

Zhao, Mi ^{[1
]}

Xu, Boyang ^{[1
]}

Zhang, Peng ^{[2
]}

Xu, Junjie ^{[2
]}

Jiang, Yong ^{[3
]}

Liu, Feng ^{[3
]}

Yan, Youwei ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Aerosp Engn, 1037 Luoyu Rd, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, 1037 Luoyu Rd, Wuhan 430074, Peoples R China

[3] Cent South Univ, Sch Mat Sci & Engn, State Key Lab Powder Met, Changsha 410083, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2022年 / 186卷

关键词：

Mechanical alloying; Oxide dispersion strengthened copper alloy; Microstructure; Nano; -oxide; Transmission electron microscopy; NANOSTRUCTURED FERRITIC ALLOYS; HIGH ELECTRICAL-CONDUCTIVITY; PROCESS-CONTROL AGENT; THERMAL-CONDUCTIVITY; COPPER ALLOY; MA-HIP; TEMPERATURE; PARTICLES; COMPOSITE; NANOCOMPOSITE;

D O I：

10.1016/j.matchar.2022.111808

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A Y-Ti-O oxide-dispersion-strengthened (ODS) Cu alloy has been successfully fabricated by mechanical alloying (MA) and spark plasma sintering (SPS). Excessive cold-welding during high energy ball-milling was effectively suppressed by mixing TiO2 and pre-alloyed Cu(Y) powders as the raw powders. Microstructural evolutions during the MA and SPS processes and the subsequent annealing were investigated with a focus on the Y-Ti-O nanooxides. The 12 h ball-milling failed to achieve super-saturations of Y, Ti, and O in Cu, which led to the in-situ formation of various types of oversized Y/Ti-rich oxides with very irregular morphologies during the SPS. With a prolonged ball-milling of 48 h, the subsequent SPS + annealing processes can promote a high density precipitation of ultra-fine Y-Ti-O nano-oxides. These nano-oxides were further identified as Y2Ti2O7 mostly, with a high degree of coherency in Cu. Fabricating Y-Ti-O ODS-Cu alloys via MA was thus confirmed to be technically feasible, although the dispersion of nano-oxides desires further improvement.

引用

页数：10

共 65 条

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