Functionally Graded Dual-nanoparticulate-reinforced Aluminium Matrix Bulk Materials Fabricated by Spark Plasma Sintering

The characteristics and sinterability of the Al2O3-ZrO2(Y2O3) nanoparticles produced by simple and effective microwave and molten salts methods and processed by using spark plasma sintering were studied and compared. The crystalline powders with the specific surface area in the range of 72–108 m2/g and crystallite size of 5–13 nm were obtained by calcination of samples prepared by both methods at 800 °C. The content of t-ZrO2 phase depends on concentration of Al2O3, Y2O3 and on calcination temperature but the impact of the preparation method is insignificant. The phase transition of tetragonal ZrO2 to monoclinic for the samples without Y2O3 started at 1000 °C though it was incomplete in the case of high content of Al2O3. The bulk materials with relative density of 86.1–98.7% were fabricated by the spark plasma sintering method at 1500–1600 °C depending on the content of Al2O3 and Y2O3.

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Recent development in reactive synthesis of nanostructured bulk materials by spark plasma sintering

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2013.01.017 ◽

2013 ◽

Vol 39 ◽

pp. 103-112 ◽

Cited By ~ 58

Author(s):

Lianjun Wang ◽

Jianfeng Zhang ◽

Wan Jiang

Keyword(s):

Spark Plasma Sintering ◽

Bulk Materials ◽

Reactive Synthesis ◽

Plasma Sintering ◽

Spark Plasma

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Structures and magnetic properties of Sm-Fe-N bulk magnets produced by the spark plasma sintering method

Journal of Materials Research ◽

10.1557/jmr.2007.0386 ◽

2007 ◽

Vol 22 (11) ◽

pp. 3130-3136 ◽

Cited By ~ 9

Author(s):

Tetsuji Saito

Keyword(s):

Magnetic Properties ◽

Spark Plasma Sintering ◽

Bulk Material ◽

Decomposition Temperature ◽

High Coercivity ◽

Bulk Materials ◽

Plasma Sintering ◽

Spark Plasma ◽

Sintering Method ◽

N Powder

Sm-Fe-N powders were successfully consolidated at 873 K and below by the spark plasma sintering (SPS) method. Although the decomposition temperature of the hard magnetic Sm2Fe17N3 phase has been reported to be 873 K, partial decomposition of the Sm2Fe17N3 phase was noted in the bulk materials obtained by sintering at below that temperature. The resultant bulk materials showed a coercivity of around 0.24 MAm−1, significantly lower than that of the original Sm-Fe-N powder. It was found that decomposition of the Sm2Fe17N3 phase in the SPS method was significantly lowered by the addition of a small amount of Zn powder to the Sm-Fe-N powder. The bulk material obtained by sintering a mixture of Sm-Fe-N and Zn powder (10%Zn) at 723 K exhibited high coercivity, comparable with that of the original Sm-Fe-N powder.

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Preparation and Mechanical Properties of Nanocrystalline Bulk Materials by Spark Plasma Sintering Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.426-432.2375 ◽

2003 ◽

Vol 426-432 ◽

pp. 2375-2380 ◽

Cited By ~ 8

Author(s):

Kiyoshi Ichikawa ◽

Takeshi Murakami ◽

Yukihiro Nakayama ◽

S. Miyamato ◽

Masao Tokita

Keyword(s):

Mechanical Properties ◽

Spark Plasma Sintering ◽

Sintering Process ◽

Bulk Materials ◽

Plasma Sintering ◽

Spark Plasma

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Preparation of Mg-W Graded Materials by Spark Plasma Sintering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.1869 ◽

2008 ◽

Vol 368-372 ◽

pp. 1869-1871

Author(s):

Qiang Shen ◽

Ying Hu Liu ◽

Jing Zhou ◽

Guo Qiang Luo ◽

Lian Meng Zhang

Keyword(s):

Spark Plasma Sintering ◽

Low Temperatures ◽

Functionally Graded ◽

Front Face ◽

Density Range ◽

Graded Materials ◽

Compression Waves ◽

Plasma Sintering ◽

Mass Fractions ◽

Spark Plasma

A new kind of functionally graded materials (FGM) with density gradient has come to show great potentials as flier-plates for creating quasi-isotropic compression waves. In order to meet the demand of lower density in the front face and wider density range for such flier-plate, Mg with a density of 1.74g/cm3 and W of 19.3g/cm3 are selected to make Mg-W system density graded materials. Mg-W alloys with various mass fractions of Mg and W were sintered by spark plasma sintering (SPS) technique at low temperatures, and the processing of densification is mainly investigated. It is found that, up to 92wt%W, the Mg-W alloys can be fully densified at 873K due to the conglutination of Mg particles. The Mg-W alloys still exist as a mechanical mixture of Mg and W. Finally, the Mg-W density graded materials with a density change from 1.74g/cm3 to 10.55g/cm3 have been successfully prepared.

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