scholarly journals Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4893
Author(s):  
Ziyang Xiu ◽  
Boyu Ju ◽  
Saiyue Liu ◽  
Yiwei Song ◽  
Jindan Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Target Volume ◽  
Functionally Graded ◽  
Gradient Material ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Al Matrix Composites

In this paper, six-layer AlN/Al gradient composites were prepared by a spark plasma sintering process to study the influences of sintering temperature and holding time on the microstructure and mechanical properties. The well-bonded interface enables the composite to exhibit excellent thermal and mechanical properties. The hardness and thermal expansion properties of the composite exhibit a gradient property. The hardness increased with the volume fraction of AlN while the CTE decreased as the volume fraction of AlN. The thermal expansion reaches the lowest value of 13–14 ppm/K, and the hardness reaches the maximum value of 1.25 GPa, when the target volume fraction of AlN is 45%. The simulation results show that this gradient material can effectively reduce the thermal stress caused by the mismatch of the thermal expansion coefficient as a transmitter and receiver (T/R) module. This paper attempts to provide experimental support for the preparation of gradient Al matrix composites.

MICROSTRUCTURE AND MECHANICAL BEHAVIOR OF AMORPHOUS Al–Cu–Ti METAL FOAMS SYNTHESIZED BY SPARK PLASMA SINTERING

2017 ◽  
Vol 24 (Supp02) ◽  
pp. 1850022
Author(s):  
MAOYUAN LI ◽  
LIN LU ◽  
ZHEN DAI ◽  
YIQIANG HONG ◽  
WEIWEI CHEN ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Intermetallic Compounds ◽  
Spark Plasma Sintering ◽  
Elevated Temperatures ◽  
Volume Fraction ◽  
Metal Foams ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Xrd Patterns

Amorphous Al–Cu–Ti metal foams were prepared by spark plasma sintering (SPS) process with the diameter of 10[Formula: see text]mm. The SPS process was conducted at the pressure of 200 and 300[Formula: see text]MPa with the temperature of 653–723[Formula: see text]K, respectively. NaCl was used as the space-holder, forming almost separated pores with the porosity of 65 vol%. The microstructure and mechanical behavior of the amorphous Al–Cu–Ti metal foams were systematically investigated. The results show that the crystallinity increased at elevated temperatures. The effect of pressure and holding time on the crystallization was almost negligible. The intermetallic compounds, i.e. Al–Ti, Al–Cu and Al–Cu–Ti were identified from X-ray diffraction (XRD) patterns. It was found that weak adhesion and brittle intermetallic compounds reduced the mechanical properties, while lower volume fraction and smaller size of NaCl powders improved the mechanical properties.

Microstructure and Properties of Spark Plasma Sintering AlN/BN Ceramics

2006 ◽  
Vol 313 ◽  
pp. 105-108 ◽  
Author(s):  
Lian Meng Zhang ◽  
Mei Juan Li ◽  
Qiang Shen ◽  
T. Li ◽  
M.Q. Yu
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Mechanical Strength ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Sintering Temperature ◽  
Composite Ceramics ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Full Densification

Aluminum nitride-boron nitride (AlN/BN) composite ceramics were prepared by spark plasma sintering (SPS). The sintering behaviors of AlN/BN composites with 5~15% volume fraction of BN were studied. The influences of BN content, as well as the sintering temperature on the density, microstructure, mechanical strength, thermal conductivity and machinability of the composites were also investigated. The results showed that the full densification of AlN/BN composite ceramics could be realized by SPS technique at the temperature no higher than 1800°C for 3 minutes. The thermal conductivity of AlN/BN composites is in the range of 66~79W/mK, and AlN/BN composites can be cut or drilled by carbides or even steel tools when BN content is 15% volume fraction. The mechanical strength of AlN/BN composites is about 330MPa and is not remarkably affected by the addition of BN. The improvement of mechanical properties of AlN/BN composite ceramics is due to the fine and homogenous microstructure developed in the SPS process.

scholarly journals Development of Graphene Reinforced Metal Matrix Composite by Spark Plasma Sintering

2018 ◽  
Vol 7 (3.32) ◽  
pp. 76
Author(s):  
Fei Gao ◽  
Yongbum Choi ◽  
Yosuke Dobashi ◽  
Kazuhiro Matsugi
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Spark Plasma Sintering ◽  
High Performance ◽  
Volume Fraction ◽  
Applied Pressure ◽  
Ceramic Particle ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Dispersed Aluminum

In order to obtain the high performance materials with high thermal conductivity, high　electrical conductivity, low thermal expansion, good mechanical properties and low density, Graphene has higher thermal conductivity comparison with other ceramic particle. In this study, graphene dispersed aluminum (Al) composites was developed by spark plasma sintering. Volume fraction of graphene were 10, 20 and 30 vol.%. Fabrication conditions of graphene dispersed aluminum (Al) composites were temperature of 813K and applied pressure of 80 MPa. As composite properties are affected by the dispersibility and volume fraction of the graphene particles, the relationship among the dispersibility of dispersant and the thermal conductivity and mechanical properties was investigated.  

Mechanical Properties and Wear Resistances of TiC or B4C Reinforced Ti-6Al-4V Prepared by Spark Plasma Sintering

2012 ◽  
Vol 706-709 ◽  
pp. 222-227 ◽  
Author(s):  
Akinori Ota ◽  
Hiroki Egawa ◽  
Hiroshi Izui
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Ceramic Particle ◽  
Specific Strength ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
High Initial Cost ◽  
The Cost

Titanium and its alloys have excellent specific strength and corrosion resistance. However, they have a high initial cost and high machining cost, and poor wear resistance. Therefore, both factors should be considered in order to reduce the cost and improve the wear resistance of titanium alloy parts. Powder metallurgy (PM) has been taken into account for lowering the their costs. Titanium alloys reinforced with ceramic particle improves their wear resistance and hardness. In this study, we focus on the microstructures, mechanical properties, and wear resistance of TiC or B4C reinforced Ti-6Al-4V composites by using spark plasma sintering. The volume fraction of the reinforcement from 0 to 19.9 vol. %. The tensile strength of TiC/ and B4C/Ti-6Al-4V had 1058MPa (14.9 vol. % TiC) and 1095MPa (1.7 vol. % B4C), respectively. Vickers harnesses of TiC/ and B4C/Ti-6Al-4V increased with increase in the volume fraction of the reinforcement. The wear resistance of B4C/Ti-6Al-4V exhibited superior to that of TiC/Ti-6Al-4V.

Microstructure and Mechanical Properties of Ti-ZrO2 Composites Fabricated by Spark Plasma Sintering

2012 ◽  
Vol 520 ◽  
pp. 269-275 ◽  
Author(s):  
Hideaki Tsukamoto ◽  
Takahiro Kunimine ◽  
Motoko Yamada ◽  
Hisashi Sato ◽  
Yoshimi Watanabe
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Spark Plasma Sintering ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Uniaxial Pressure ◽  
Graded Materials ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma

This study aims to investigate the microstructure and mechanical properties of Ti-ZrO2 composites and ZrO2/Ti functionally graded materials (FGMs) fabricated by spark plasma sintering (SPS). SPS has been conducted in a vacuum at 1400 oC under the uniaxial pressure of 30 MPa. Mechanical properties such as hardness and elastic modulus of Ti-ZrO2 composites have been systematically investigated using micro-Vickers and nanoindentation. The experimental results demonstrate that the mechanical properties of Ti are dramatically improved by an addition of small amount of ZrO2. There is almost no effect from the presence of Y2O3 in ZrO2 on the hardness of Ti-ZrO2 composites. ZrO2/Ti FGMs have been successfully fabricated, and mechanical properties of the FGMs have been examined.

Preparation and Properties of ZrB2-Cu Composites by Spark Plasma Sintering

2012 ◽  
Vol 512-515 ◽  
pp. 739-743 ◽  
Author(s):  
S.Z. Zhu ◽  
D.L. Gong ◽  
Z. Fang ◽  
Q. Xu
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Sintering Temperature ◽  
High Electrical Conductivity ◽  
Particulate Reinforcement ◽  
Plasma Sintering ◽  
Spark Plasma

For high thermal conductivity and high electrical conductivity, copper is a good electrode material. The wearing resistance and spark resistance of Cu can be improved with the addition of ZrB2. ZrB2-Cu composites with high Cu volume fraction was successfully prepared by spark plasma sintering (SPS) process in this paper. The microstructure and properties of the sintered samples were characterized. The effect of the sintering temperature and the ZrB2 content in composites on the relative density and properties of the composites were investigated. The results show that the relative density and mechanical properties increase with the sintering temperature increasing. The optimum sintering temperature is 900 °C for 10wt.% ZrB2-Cu, 1000 °C for 20wt.% ZrB2-Cu and 1050 °C for 30wt.% ZrB2-Cu. With the ZrB2 content in composites increasing from 10wt.% to 30 wt.%, the electrical resistivity increases from 2.25×10-6 Ω.cm to 8.82×10-6 Ω.cm, the flexural strength decreases from to 539.1 MPa to 482.2 MPa and the fracture toughness decreases from to 15 MPa.m 1/2 to 9 MPa.m 1/2. The hardness (HV) of ZrB2-Cu composites is significantly enhanced by the ZrB2 particulate reinforcement, increasing from 1410 MPa for 10 wt.% ZrB2 to 2480 MPa for 30wt.% ZrB2.

Microstructure and Mechanical Properties of Nb-Al-N and Nb-Si-B Powder Compacts Produced by Spark Plasma Sintering

1998 ◽  
Vol 552 ◽  
Author(s):  
T. Murakamia ◽  
A. Kitaharab ◽  
M. Kawahara ◽  
Y. Takahashid ◽  
H. Inui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yield Stress ◽  
Oxidation Resistance ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder Compacts ◽  
Nitrogen Contents ◽  
Better Than

ABSTRACTNb-Al-N and Nb-Si-B powder compacts were prepared by spark plasma sintering, and their microstructure, mechanical properties and oxidation behavior were investigated. Adding nitrogen was easily done by blending or mechanically alloying Nb and AIN powders and then sintering them. The addition of nitrogen caused the formation of Nb2N in all the Nb-Al-N compacts and Nb2N and Nb3Al2N in compacts with high aluminum and nitrogen contents. The highest room-temperature hardness and the highest yield stress at 1473K were observed for compacts consisting of Nb2N and Nb3Al2N and those consisting of Nb2N and Nb2Al, respectively. Nb-Si-B compacts were prepared from elemental powders. Two or three of NbB2, Nb5Si3, Nb5Si3B2 and NbSi2 phases were identified as constituent phases of Nb-Si-B compacts depending on composition unless a large amount of silicon is consumed by forming SiO2. Contributions of NbB2, NbSi3 and Nb5Si3B2 phases to room-temperaturehardness and yield stress at 1973K were much larger than those of NbSi2. However, the oxidation resistance of Nb-Si-B compacts increased with increasing the volume fraction of NbSi2.The oxidation resistance of NbSi3B2 was better than that of NbSi3, but was not as good as that of NbSi2.

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