Effects of Al3Ti Addition on the Sintering of TiB2

2011 ◽  
Vol 1307 ◽  
Author(s):  
Masashi Yoshida
Keyword(s):  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
Titanium Diboride ◽  
Remarkable Improvement ◽  
Plasma Sintering ◽  
Spark Plasma

ABSTRACTTitanium diboride (TiB2) has been sintered using spark plasma sintering (SPS). With the addition of Al3Ti, the Vickers hardness, Hv, of TiB2 increases up to as high as 2100 by the sintering at 1273K, while that of the sample sintered without Al3Ti is as low as 20. Such a remarkable improvement is caused by the formation of rigid direct contacts between TiB2 grains in addition to the effect that Al3Ti fills in the space between TiB2 grains and acts as a binder.

Effects of Al3Ti and (Al,Ni)3Ti Addition on the Sintering of TiB2

2012 ◽  
Vol 1373 ◽  
Author(s):  
Masashi Yoshida
Keyword(s):  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
Titanium Diboride ◽  
Direct Link ◽  
Remarkable Improvement ◽  
Plasma Sintering ◽  
Spark Plasma

ABSTRACTTitanium diboride has been sintered using spark plasma sintering (SPS). With the addition of tetragonal Al3Ti or cubic (Al,Ni)3Ti, the Vickers hardness, Hv, of TiB2 increases up to as high as 2000 by the sintering at 1273K, while that of the sample sintered without additives is as low as 20. Such a remarkable improvement is caused by the improvement of direct link between TiB2 grains in addition to the effect that Al3Ti or (Al,Ni)3Ti fills in the space between TiB2 grains and act as a binder.

Microstructure of Cu-TiB2 Nanocomposite during Spark Plasma Sintering

2004 ◽  
Vol 449-452 ◽  
pp. 1113-1116 ◽  
Author(s):  
Young Soon Kwon ◽  
Ji Soon Kim ◽  
Jong Jae Park ◽  
Hwan Tae Kim ◽  
Dina V. Dudina
Keyword(s):  
Spark Plasma Sintering ◽  
Titanium Diboride ◽  
Copper Matrix ◽  
Microstructural Change ◽  
Simultaneous Action ◽  
Fine Grained ◽  
Pulse Electric Current ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Pulse Electric

Microstructural change of TiB2-Cu nanocomposite during spark plasma sintering (SPS) was investigated. Under simultaneous action of pressure, temperature and pulse electric current titanium diboride nanoparticles distributed in copper matrix move, agglomerate and form a interpenetrating phase composite with a fine-grained skeleton. Increase of SPS temperatures and holding times promotes the densification of sintered compacts due to local melting of copper matrix.

scholarly journals Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1268 ◽  
Author(s):  
Natalia Shkodich ◽  
Alexey Sedegov ◽  
Kirill Kuskov ◽  
Sergey Busurin ◽  
Yury Scheck ◽  
...  
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
High Energy ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

For the first time, a powder of refractory body-centered cubic (bcc) HfTaTiNbZr-based high-entropy alloy (RHEA) was prepared by short-term (90 min) high-energy ball milling (HEBM) followed by spark plasma sintering (SPS) at 1300 °C for 10 min and the resultant bulk material was characterized by XRD and SEM/EDX. The material showed ultra-high Vickers hardness (10.7 GPa) and a density of 9.87 ± 0.18 g/cm³ (98.7%). Our alloy was found to consist of HfZrTiTaNb-based solid solution with bcc structure as a main phase, a hexagonal closest packed (hcp) Hf/Zr-based solid solution, and Me2Fe phases (Me = Hf, Zr) as minor admixtures. Principal elements of the HEA phase were uniformly distributed over the bulk of HfTaTiNbZr-based alloy. Similar alloys synthesized without milling or in the case of low-energy ball milling (LEBM, 10 h) consisted of a bcc HEA and a Hf/Zr-rich hcp solid solution; in this case, the Vickers hardness of such alloys was found to have a value of 6.4 GPa and 5.8 GPa, respectively.

In situ boron carbide–titanium diboride composites prepared by mechanical milling and subsequent Spark Plasma Sintering

2008 ◽  
Vol 43 (10) ◽  
pp. 3569-3576 ◽  
Author(s):  
Dina V. Dudina ◽  
Dustin M. Hulbert ◽  
Dongtao Jiang ◽  
Cosan Unuvar ◽  
Sheldon J. Cytron ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
Titanium Diboride ◽  
Mechanical Milling ◽  
Plasma Sintering ◽  
Spark Plasma

Preparation of β SiAlON-cBN Composites by Spark Plasma Sintering

2008 ◽  
Vol 403 ◽  
pp. 241-242
Author(s):  
Mikinori Hotta ◽  
Takashi Goto
Keyword(s):  
Phase Transformation ◽  
Boron Nitride ◽  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
Hexagonal Boron Nitride ◽  
Cubic Boron Nitride ◽  
Holding Time ◽  
Theoretical Density ◽  
Plasma Sintering ◽  
Spark Plasma

SiAlON-cubic boron nitride (cBN) composite was prepared by spark plasma sintering (SPS) using -SiAlON and cBN powders as starting materials, and the effect of holding time on densification, phase transformation and hardness of the composite was investigated. The SiAlON-cBN composite containing 20 vol% cBN sintered at 1650oC for 60s was densified to >97% of theoretical density. cBN phase transformed to hexagonal boron nitride (hBN) in the SiAlON-cBN composite with increasing holding time at 1650oC. Vickers hardness of the SiAlON-20vol%cBN composite sintered at 1650oC for 60-300s was 17.7GPa, and the hardness decreased with increasing holding time.

scholarly journals Tricalcium Phosphate - Magnesium Interface: Microstructure and Properties

2016 ◽  
Vol 258 ◽  
pp. 412-415 ◽  
Author(s):  
Mariano Casas Luna ◽  
Edgar Benjamin Montúfar Jimenéz ◽  
Miroslava Horynová ◽  
Pavel Gejdoš ◽  
Lenka Klakurková ◽  
...  
Keyword(s):  
Composite Material ◽  
Chemical Composition ◽  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
Tricalcium Phosphate ◽  
Interface Microstructure ◽  
Mechanical Interaction ◽  
Microstructure And Properties ◽  
Plasma Sintering ◽  
Spark Plasma

The fabrication of a composite material based on magnesium (Mg) and tricalcium phosphate is reported in this work. Rods of β-tricalcium phosphate (β-TCP) were processed and consolidated together with pure Mg powder through spark plasma sintering (SPS). The microstructure at the interface, the chemical composition and transformation of the components and the microhardness were analysed. The microstructure of the composite shows two zones with well-defined and continuous interface between them: a ceramic zone composed by β-TCP filled with Mg and the metallic zone constituted by Mg and Mg rich eutectic. Vickers hardness shows the excellent mechanical interaction between the two zones.

Effect of titanium diboride on the homogeneity of boron carbide ceramic by flash spark plasma sintering

2018 ◽  
Vol 44 (13) ◽  
pp. 15323-15330 ◽  
Author(s):  
Jiawei Wu ◽  
Bo Niu ◽  
Fan Zhang ◽  
Liwen Lei ◽  
Jinyong Zhang ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
Titanium Diboride ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Preparation of titanium diboride TiB2 by spark plasma sintering at slow heating rate

2007 ◽  
Vol 8 (5) ◽  
pp. 376-382 ◽  
Author(s):  
Jürgen Schmidt ◽  
Marian Boehling ◽  
Ulrich Burkhardt ◽  
Yuri Grin
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Titanium Diboride ◽  
Slow Heating ◽  
Plasma Sintering ◽  
Spark Plasma
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