CARBON CONTENT INFLUENCE ON PHYSICO-MECHANICAL PROPERTIES OF TUNGSTEN-BASED COMPOSITES WITH MARAGING-BASED BINDER

1970 ◽  
Vol 61 (11) ◽  
Author(s):  
Marina I. Zharchenkova ◽  
Sergey A. Perfilov ◽  
Vladimir D. Blank
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Carbon Content ◽  
Spark Plasma Sintering ◽  
Cumulative Effect ◽  
Sintering Time ◽  
Synthetic Diamonds ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

The effect of carbon content on physico-mechanical properties in tungsten-based composite material obtained by spark plasma sintering method was investigated in this work. Maraging steel-based composition was used as binder and contained such metals as Fe, Ni, Co, Mo, Ti. Carbon content (synthetic diamonds of 3/2 fraction) was varied from 0.1 to 0.3 wt.%. It was shown that 0.1 % wt of carbon resulted in composite durability and plasticity growth though further increase in carbon content up to 0.3% wt. resulted in composite durability growth accompanied with composite plasticity decrease. Sintering time influence (3, 5, 7 min) was investigated. It was shown that this sintering process parameter has ambiguous influence on physico-mechanical properties of obtained composite material due to cumulative effect of other parameters. Sintering time temperature in 1300–1350 °C is investigated. It was shown that 1320 °C is optimal sintering temperature. 1350 °C resulted in binder liquefaction and its components migration from die mould. Aging process of sintered material with maraging-based binder was investigated. In common case, this process resulted in durability, plasticity and hardness growth of composite material. Spark plasma sintering method application allows to minimization of tungsten grain growth. After sintering tungsten grains size remained in 1–3 μm.

scholarly journals Influence of Ti3C2Tx MXene and Surface-Modified Ti3C2Tx MXene Addition on Microstructure and Mechanical Properties of Silicon Carbide Composites Sintered via Spark Plasma Sintering Method

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3558
Author(s):  
Mateusz Petrus ◽  
Jarosław Woźniak ◽  
Tomasz Cygan ◽  
Artur Lachowski ◽  
Dorota Moszczyńska ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Silicon Carbide ◽  
Spark Plasma Sintering ◽  
Reference Sample ◽  
Plasma Sintering ◽  
New Findings ◽  
Spark Plasma ◽  
Surface Modified ◽  
Sintering Method

This article presents new findings related to the problem of the introduction of MXene phases into the silicon carbide matrix. The addition of MXene phases, as shown by the latest research, can significantly improve the mechanical properties of silicon carbide, including fracture toughness. Low fracture toughness is one of the main disadvantages that significantly limit its use. As a part of the experiment, two series of composites were produced with the addition of 2D-Ti3C2Tx MXene and 2D-Ti3C2Tx surface-modified MXene with the use of the sol-gel method with a mixture of Y2O3/Al2O3 oxides. The composites were obtained with the powder metallurgy technique and sintered with the Spark Plasma Sintering method at 1900 °C. The effect adding MXene phases had on the mechanical properties and microstructure of the produced sinters was investigated. Moreover, the influence of the performed surface modification on changes in the properties of the produced composites was determined. The analysis of the obtained results showed that during sintering, the MXene phases oxidize with the formation of carbon flakes playing the role of reinforcement. The influence of the Y2O3/Al2O3 layer on the structure of carbon flakes and the higher quality of the interface was also demonstrated. This was reflected in the higher mechanical properties of composites with the addition of modified Ti3C2Tx. Composites with 1 wt.% addition of Ti3C2Tx M are characterized with a fracture toughness of 5 MPa × m0.5, which is over 50% higher than in the case of the reference sample and over 15% higher than for the composite with 2.5 wt.% addition of Ti3C2Tx, which showed the highest fracture toughness in this series.

scholarly journals Preparation of TiAl15Si15 alloy by High Pressure Spark Plasma Sintering

2018 ◽  
Vol 24 (2) ◽  
pp. 174
Author(s):  
Anna Knaislová ◽  
Pavel Novák ◽  
Filip Průša ◽  
Sławomir Cygan ◽  
Lucyna Jaworska
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Powder Metallurgy ◽  
Spark Plasma Sintering ◽  
Elevated Temperatures ◽  
Reactive Sintering ◽  
Compact Sample ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

<p class="AMSmaintext"><span lang="EN-GB">This work deals with preparation of intermetallic alloy TiAl15Si15 (wt. %) by powder metallurgy using Spark Plasma Sintering method. Ti-Al-Si alloys are known as materials with low density, relatively good mechanical properties in comparison with their density and good oxidation and corrosion resistance at elevated temperatures. Preparation of intermetallics by melting metallurgy is very problematic. Powder metallurgy using reactive sintering followed by suitable compaction seems to be a promising method. In this work, TiAl15Si15 alloy was prepared by reactive sintering, milling and by unique ultra-high pressure Spark Plasma Sintering within the framework of international cooperation in Krakow. For the comparison it was also prepared by conventional Spark Plasma Sintering. The results show that higher pressure of sintering decreases the porosity of compact sample and increases mechanical properties, especially hardness.</span></p>

scholarly journals Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1546 ◽  
Author(s):  
Kyungju Kim ◽  
Dasom Kim ◽  
Kwangjae Park ◽  
Myunghoon Cho ◽  
Seungchan Cho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Intermetallic Compounds ◽  
Spark Plasma Sintering ◽  
Sintering Process ◽  
Composite Powders ◽  
Cu Content ◽  
Plasma Sintering ◽  
Spark Plasma

Aluminium–copper composite materials were successfully fabricated using spark plasma sintering with Al and Cu powders as the raw materials. Al–Cu composite powders were fabricated through a ball milling process, and the effect of the Cu content was investigated. Composite materials composed of Al–20Cu, Al–50Cu, and Al–80Cu (vol.%) were sintered by a spark plasma sintering process, which was carried out at 520 °C and 50 MPa for 5 min. The phase analysis of the composite materials by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) indicated that intermetallic compounds (IC) such as CuAl2 and Cu9Al4 were formed through reactions between Cu and Al during the spark plasma sintering process. The mechanical properties of the composites were analysed using a Vickers hardness tester. The Al–50Cu composite had a hardness of approximately 151 HV, which is higher than that of the other composites. The thermal conductivity of the composite materials was measured by laser flash analysis, and the highest value was obtained for the Al–80Cu composite material. This suggests that the Cu content affects physical properties of the Al–Cu composite material as well as the amount of intermetallic compounds formed in the composite material.

scholarly journals Property Evaluation of Tungsten-Carbide Hard Materials as a Function of Fe Contents

2020 ◽  
Vol 58 (8) ◽  
pp. 533-539
Author(s):  
Ju-Hun Kim ◽  
Jeong-Han Lee ◽  
Junho Jang ◽  
Ik-Hyun Oh ◽  
Sung-Kil Hong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Milled Powder ◽  
Mixed Powder ◽  
Hard Materials ◽  
Property Evaluation ◽  
Plasma Sintering ◽  
Powder Samples ◽  
Spark Plasma ◽  
Sintering Method

In this study, consolidated WC-Fe compacts as a function of Fe contents were fabricated by a spark plasma sintering method, following the mixed by the ball-milled powder. Fe among the metallic binders was added to WC enhance not only the driving force of sintering process but also suppressing the grain growth. WC-Fe mixed powder samples were fabricated with 5, 10 and 15 wt.% Fe contents, and the particle sizes of the mixed powders were determined to be 2.15 to 3.15 µm, respectively. The WC-Fe mixed powders were processed by spark plasma sintering, at a sintering temperature of 1300 oC. Consequently, the relative densities of the WC-5, 10 and 15 wt.% Fe sintered-bodies were about 99.2, 99.5 and 100%, respectively. The grain sizes of the WC-5, 10 and 15 wt.% Fe sintered-bodies were about 0.92, 0.98 and 1.02 µm, respectively. The Fe particles penetrated into the WC particles by dissolving and re-precipitation, and the final sintered bodies were completely densified. The mechanical properties of the WC-Fe sintered-bodies exhibited a hardness up to 1934 kg·mm2 and a fracture toughness above 6.88 MPa·m1/2. The microstructure behavior of the WC-Fe sintered-bodies was investigated in terms of mechanical properties to examine their properties for various Fe contents. In addition, the mechanical and physical properties were compared with the reported values for other sintering-processes, i.e. HFIHS, HIP, etc.

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