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 of Functionally Graded Cu/AlN/Cu Electrode Materials for Thermoelectric Devices

2007 ◽  
Vol 336-338 ◽  
pp. 2613-2615 ◽  
Author(s):  
Huai Quan Zhang ◽  
Jing Feng Li
Keyword(s):  
Spark Plasma Sintering ◽  
Functionally Graded Materials ◽  
Electrode Materials ◽  
Functionally Graded ◽  
Thermoelectric Devices ◽  
Graded Materials ◽  
Step Process ◽  
Plasma Sintering ◽  
Spark Plasma

The Cu/AlN/Cu functionally graded materials (FGMs) were successfully fabricated using the spark plasma sintering (SPS) method, and a two-step process was used. First, a symmetrical porositygraded AlN plate was prepared using AlN powder consisting of particles of varying sizes. Afterwards, graded Cu/AlN/Cu samples were made by introducing Cu into the pores of the external, porous AlN layer.

Functionally Graded Nano Hardmetal Materials Made by Spark Plasma Sintering Technology

2005 ◽  
Vol 23 ◽  
pp. 179-182 ◽  
Author(s):  
Xinglong Tan ◽  
Shaoyu Qiu ◽  
Wenyan He ◽  
Daifu Lei
Keyword(s):  
Stainless Steel ◽  
Internal Stress ◽  
Spark Plasma Sintering ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
The Other ◽  
Graded Materials ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Processes

The properties of nano WC/Co hardmetals prepared by different Spark Plasma Sintering processes were measured. A 4-layer Functionally Graded Materials (FGM) was also obtained by Spark Plasma Sintering technology (SPS), starting from powders of nano WC/10%Co, nano WC/12%Co, micro WC/15%Co and stainless steel disk. The other 3-layer FGM was made from powders of nano 21%Al2O3/ZrO2, nickel and stainless steel. The SPS processing led to FGM free of internal stress, which was measured using Vickers indentations.

scholarly journals Effect of SiC Nanowhisker on the Microstructure and Mechanical Properties of WC-Ni Cemented Carbide Prepared by Spark Plasma Sintering

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Xiaoyong Ren ◽  
Zhijian Peng ◽  
Zhiqiang Fu ◽  
Chengbiao Wang
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Tantalum Carbide ◽  
Uniaxial Pressure ◽  
Cemented Carbides ◽  
X Ray Diffraction ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Microscopy Examination

Ultrafine tungsten carbide-nickel (WC-Ni) cemented carbides with varied fractions of silicon carbide (SiC) nanowhisker (0–3.75 wt.%) were fabricated by spark plasma sintering at 1350°C under a uniaxial pressure of 50 MPa with the assistance of vanadium carbide (VC) and tantalum carbide (TaC) as WC grain growth inhibitors. The effects of SiC nanowhisker on the microstructure and mechanical properties of the as-prepared WC-Ni cemented carbides were investigated. X-ray diffraction analysis revealed that during spark plasma sintering (SPS) Ni may react with the applied SiC nanowhisker, forming Ni2Si and graphite. Scanning electron microscopy examination indicated that, with the addition of SiC nanowhisker, the average WC grain size decreased from 400 to 350 nm. However, with the additional fractions of SiC nanowhisker, more and more Si-rich aggregates appeared. With the increase in the added fraction of SiC nanowhisker, the Vickers hardness of the samples initially increased and then decreased, reaching its maximum of about 24.9 GPa when 0.75 wt.% SiC nanowhisker was added. However, the flexural strength of the sample gradually decreased with increasing addition fraction of SiC nanowhisker.

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