Mechanical Ball Milling and Liquid Phase Sintering of Steel-Bonded Cemented Carbide Machining Crumbs

2013 ◽  
Vol 765-767 ◽  
pp. 210-212
Author(s):  
Jian Ye ◽  
Wei Gao ◽  
Wen Ke Li ◽  
Zhao Qiang Zeng
Keyword(s):  
Wear Resistance ◽  
Liquid Phase ◽  
Ball Milling ◽  
Liquid Phase Sintering ◽  
Experimental Results ◽  
Cemented Carbide ◽  
Carbide Alloy ◽  
Conventional Steel ◽  
Mechanical Ball Milling

The technology is introduced about mechanical ball milling and liquid phase sintering of machining crumbs of steel based carbide alloy in this article. The materials obtained from machining crumbs of steel-bonded cemented carbide are qualified compared with the conventional steel-bonded cemented carbide materials in the aspects of hardness, wear resistance by using the technology and the process is reasonable and practicable, according to experimental results. It can be extremely important when considering the recycling and make full use of tungsten resources.

Improving the dry sliding-wear resistance of B4C ceramics by transient liquid-phase sintering

2020 ◽  
Vol 40 (15) ◽  
pp. 5286-5292 ◽  
Author(s):  
Cristina Ojalvo ◽  
Estíbaliz Sánchez-González ◽  
Fernando Guiberteau ◽  
Oscar Borrero-López ◽  
Angel L. Ortiz
Keyword(s):  
Wear Resistance ◽  
Liquid Phase ◽  
Sliding Wear ◽  
Transient Liquid Phase ◽  
Liquid Phase Sintering ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Transient Liquid Phase Sintering

Wear resistance of in situ MMC produced by supersolidus liquid phase sintering (SLPS)

Wear ◽  
2009 ◽  
Vol 267 (11) ◽  
pp. 1791-1797 ◽  
Author(s):  
Hans Berns ◽  
Anastasia Saltykova
Keyword(s):  
Wear Resistance ◽  
Liquid Phase ◽  
Liquid Phase Sintering

Synthesis of WC-10wt.%Co Nanocrystalline Powders with Grain Growth Inhibitor by MTP

2007 ◽  
Vol 534-536 ◽  
pp. 1237-1240 ◽  
Author(s):  
Dong Kyu Park ◽  
Kwang Chul Jung ◽  
Jin Chun Kim ◽  
Sung Yeal Bae ◽  
In Sup Ahn
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Liquid Phase ◽  
Grain Growth ◽  
Growth Inhibitor ◽  
Liquid Phase Sintering ◽  
Nanocrystalline Powders ◽  
Grain Growth Inhibitor ◽  
Nano Crystalline ◽  
Carburizing Process

To improve the fracture strength and wear resistance of WC-Co cemented carbide, various technologies have been developed related producing the nano crystalline. There have been extensive studied conducted to retard grain growth during liquid phase sintering. However, when this inhibitor is added by simple mixing, a micro-pores forms during sintering In this study, WC-Co nanocrystalline powders with grain growth inhibitor in the site were prepared by MTP (Mechano-Thermic carburizing Process) to minimize this formation of micro pores and to retard grain growth effectively during sintering. In addition, then the phase and grain size of WC-Co nanocrystalline powders were evaluated according to the condition of MTP.

Electron Fractographic Analysis of Cemented Carbide Tool Materials

1967 ◽  
Vol 25 ◽  
pp. 284-285
Author(s):  
D. O'Neill
Keyword(s):  
Liquid Phase ◽  
Elevated Temperatures ◽  
Liquid Phase Sintering ◽  
Cemented Carbide ◽  
Controlled Atmosphere ◽  
Carbide Tool ◽  
Hot Press ◽  
Simultaneous Application ◽  
Tool Materials ◽  
Cemented Carbide Tool

A research program is currently being conducted for developing new cemented-carbide tool materials which will be capable of exhibiting exceptional hardness, toughness, strength and oxidation resistance at elevated temperatures. A series of refractory binder alloys in combinaticn with various carbides is being investigated. Liquid phase sintering during the simultaneous application of pressure in a controlled atmosphere hot press is used as the method of densification.

Effect of silicon on the properties of sintered alloys of (Al – Si) – Sn system

2021 ◽  
Vol 5 ◽  
pp. 37-48
Author(s):  
N. M. Rusin ◽  
◽  
A. L. Skorentsev ◽  
Keyword(s):  
Wear Resistance ◽  
Liquid Phase ◽  
Dry Friction ◽  
Structural Features ◽  
Liquid Phase Sintering ◽  
Favorable Effect ◽  
Sintered Compact ◽  
Friction Forces ◽  
Aluminum Powders ◽  
Sintered Alloys

Structural features of composites of the (Al – xSi) – 40Sn system prepared by liquid-phase sintering of mixtures of tin powder of PO 2 grade with powders of Al – Si alloys of hypoeutectic, eutectic, and hypereutectic composition were studied in this work. Samples were cut from the prepared materials for compression test and dry friction test against steel according to the “pin-on-disk” scheme. It was established that the main structural elements of the sintered composites are determined by the nature of interaction of solid silumin particles and liquid tin. This is due to the fact that tin not only spreads over the volume of the sintered compact, but also activates the processes of recrystallization of aluminum powders due to dissolution of their atoms in the liquid phase with subsequent deposition on the large particles surface. The dissolution weakens the skeleton of aluminum powders, and they are able to regroup into a denser configuration under the action of capillary forces. It was found that silicon inhibits the shrinkage of the compacts during the liquid-phase sintering. Therefore, to improve the mechanical properties of the sintered composites, they should be subjected to additional densification in order to eliminate their residual porosity, which simultaneously contributes to a significant increase in their wear resistance under dry friction. The study of the wear features of the (Al – хSi) – 40Sn composites was carried out. It was found that silicon particles located in the tin interlayers hinder the relative shear of the neighboring matrix grains and increase the thickness of the surface layer involved in deformation by friction forces. This fact has a favorable effect on the wear resistance of the investigated sintered composites under dry friction process. The (Al – 12Si) – 40Sn composite sample with the eutectic matrix has the highest wear resistance.

Liquid-phase sintering of BN doped Fe-Cu/TiC composites

1996 ◽  
Vol 54 ◽  
pp. 666-667
Author(s):  
Nuri Durlu ◽  
Nan Yao ◽  
David L. Milius ◽  
Ilhan A. Aksay
Keyword(s):  
Wear Resistance ◽  
Liquid Phase ◽  
Hot Pressing ◽  
Liquid Phase Sintering ◽  
Electron Microscopic ◽  
Hard Particles ◽  
Cu Alloys ◽  
The Matrix ◽  
Full Densification

Fe-Cu composites are commonly produced by liquid phase sintering (above the melting temperature of Cu, 1085°C). The wear resistance of these Fe-Cu alloys can be enhanced by introducing hard particles, e.g., TiC, into the matrix. In such cases, however, the densification of Fe-Cu/TiC composites by liquid phase sintering becomes difficult mainly due to the high wetting angle (110° at 1100-1200°C in argon) of liquid Cu with TiC particles. Especially when the amount of the TiC phase is high enough to form a continuous network of TiC grains, full densification is only achieved through hot pressing. We have recently overcome this problem in an [(Fe-4 wt% Cu) + 30 wt% TiC] composite by the addition of small amounts of BN. Composites with BN additives have been successfully sintered at 1275°C under vacuum or argon by additions of 1 wt% BN. Electron microscopic characterization of these composites has shown that this success is due to the modification of the liquid phase by the addition of BN, which also promotes the liquid phase sintering of the TiC phase.

scholarly journals Interpretation of Frenkel’s theory of sintering considering evolution of activated pores: III. Determination of equilibrium sintering time

2015 ◽  
Vol 47 (2) ◽  
pp. 215-219
Author(s):  
C.L. Yu ◽  
D.P. Gao ◽  
F. Wang ◽  
R.J. Huo ◽  
X.M. Hao ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Experimental Results ◽  
Equilibrium Time ◽  
Sintering Time ◽  
Good Accordance ◽  
Cordierite Glass ◽  
The Mathematical Model

In this article, the Frenkel?s theory of liquid-phase sintering was interpreted regarding pores as the activated volume. The mathematical model established by Nikolic et al. was used to infer the equilibrium sintering time at varied sintering temperatures during the isothermal sintering of codierite glass by Giess et al. Through the calculation, the equilibrium time at 800?C, 820?C, 840?C and 860?C is inferred to be 7014.42mins, 1569.65mins, 368.92mins and 114.61mins, respectively. The equilibrium time decreases as the temperature increases. And the theoretical value is in good accordance with the experimental results. Thus, the model established by Nikolic et al. can be applied successfully to predict the equilibrium sintering time of the cordierite glass at varied temperatures during isothermal sintering.

Liquid phase sintering-based coating of Al2O3/TiC composite layer on cemented carbide

2016 ◽  
Vol 162 ◽  
pp. 146-149 ◽  
Author(s):  
Mei Yang ◽  
Zhixing Guo ◽  
Shijie Zhang ◽  
Hao Du ◽  
Jianping Long ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Composite Layer ◽  
Liquid Phase Sintering ◽  
Cemented Carbide
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