Improved performance of SrFe12O19 bulk magnets through bottom-up nanostructuring

Nanoscale ◽  
2016 ◽  
Vol 8 (5) ◽  
pp. 2857-2866 ◽  
Author(s):  
Matilde Saura-Múzquiz ◽  
Cecilia Granados-Miralles ◽  
Marian Stingaciu ◽  
Espen Drath Bøjesen ◽  
Qiang Li ◽  
...  

High-performance hexaferrite magnets of aligned single-domain nanoplatelets are obtained by supercritical synthesis and compaction through Spark Plasma Sintering.


2018 ◽  
Vol 44 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Yingge Shi ◽  
Wenge Chen ◽  
Longlong Dong ◽  
Hanyan Li ◽  
Yongqing Fu


2006 ◽  
Vol 88 (9) ◽  
pp. 092104 ◽  
Author(s):  
Heng Wang ◽  
Jing-Feng Li ◽  
Ce-Wen Nan ◽  
Min Zhou ◽  
Weishu Liu ◽  
...  


Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1355
Author(s):  
Zhiyong Xue ◽  
Xiuzhu Han ◽  
Wenbo Luo ◽  
Zhiyong Zhou ◽  
Zhizhong Cheng ◽  
...  

The synergic strengthening of multiple phases is an essential way to achieve high-performance Mg alloys. Herein, Mg-Gd-Zn alloy containing four phases was prepared by rapid solidification (RS) ribbons and spark plasma sintering (SPS). The microstructure of the alloy consisted of α-Mg, nanosized β1 phase particles, lamellar long period stacking ordered (LPSO) phase, and β′ phase precipitates. The microstructural evolution was also investigated. The results show that the metastable β1 phase was formed in the as-cast solidification through rapid solidification, because both Zn atoms and the short holding-time at molten liquid facilitated the formation of the β1 phase. The β1 phase grew from 35.6 to 154 nm during the sintering process. Meanwhile, the fine lamellar LPSO phase was simultaneously formed after the Zn-Gd clusters were generated from the supersaturated solid solution, and the width of the LPSO phase was only in the range of 2–30 nm. The third strengthening phase, the metastable β′ phase, was obtained by aging treatment. The results of hardness testing implied that the hardness of the alloy containing the aforementioned three nanosized strengthening phases significantly improved about 47% to 126 HV compared with that of the as-cast ingot.



2009 ◽  
Vol 57 (9) ◽  
pp. 2757-2764 ◽  
Author(s):  
Cui Yu ◽  
Tie-Jun Zhu ◽  
Rui-Zhi Shi ◽  
Yun Zhang ◽  
Xin-Bing Zhao ◽  
...  


2020 ◽  
pp. 157925
Author(s):  
Tao Wang ◽  
Fen Xu ◽  
Lixian Sun ◽  
Lei Miao ◽  
Lumin Liao ◽  
...  


2013 ◽  
Vol 712-715 ◽  
pp. 208-212 ◽  
Author(s):  
Abdul Rehman Niazi ◽  
Shu Kui Li ◽  
Ying Chun Wang ◽  
Zhi Yu Hu ◽  
Usman Zahid

In modern electronic devices overheating has become a critical issue due to high power density and improved performance. In order to overcome this critical issue, the demands for materials having high thermal conductivity with low and tailorable coefficient of thermal expansions are required. This demand can be fulfilled by synthesizing copper/diamond composites, which show excellent thermo-physical properties, compatible with semiconductors and can be used in heat sink and thermal management applications. Copper/Diamond composites were fabricated by Spark Plasma Sintering Method (SPS) by electrolessly copper coated diamond particles pre coated with 1wt% Chromium. The prepared composites were investigated for various properties like thermal conductivity, thermal expansion and characterized by Scanning Electron Microscopy (S.E.M) and X-ray diffraction (X.R.D) analyses. The effect of process parameters were also taken into account. Thermal conductivity of copper/diamond composites fabricated by SPS at 1100°C under pressure of 40MPa, obtained in this case was 400 W/m•K , which is quite higher than those heat sink materials being already in use.



2016 ◽  
Vol 90 ◽  
pp. 115-121 ◽  
Author(s):  
Guodong Cui ◽  
Xialu Wei ◽  
Eugene A. Olevsky ◽  
Randall M. German ◽  
Junying Chen




2021 ◽  
pp. 158-161
Author(s):  
E.V. Ageeva ◽  
B.N. Sabel’nikov

The results of experimental studies of a KNT16 tungsten-free hard alloy sintered from electroerosive powders obtained in ethyl alcohol are presented. It is shown that the use of the spark plasma sintering method to produce products from powder obtained by electroerosive dispersion of the alloy KNT16 will ensure high performance of parts due to the uniformity of the surface, favorable structure and low porosity of the product.



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