Effect of geometrical structural parameters on the strength properties of hard alloys based on titanium carbide

1996 ◽  
Vol 34 (3-4) ◽  
pp. 186-188 ◽  
Author(s):  
M. S. Koval'chenko ◽  
A. V. Laptev ◽  
V. V. Sverdel ◽  
N. A. Yurchuk
Keyword(s):  
Titanium Carbide ◽  
Structural Parameters ◽  
Strength Properties ◽  
Hard Alloys

Tungsten-free hard alloys based on titanium carbide

2000 ◽  
Vol 36 (1) ◽  
pp. 24-27 ◽  
Author(s):  
Yu. V. Levinskii ◽  
A. P. Petrov
Keyword(s):  
Titanium Carbide ◽  
Hard Alloys

scholarly journals Physico-Mechanical Performance Evaluation of Large Pore Synthetic Meshes with Different Textile Structures for Hernia Repair Applications

2018 ◽  
Vol 26 (2(128)) ◽  
pp. 79-86 ◽  
Author(s):  
Pengbi Liu ◽  
Hong Shao ◽  
Nanliang Chen ◽  
Nanliang Cheng ◽  
Jinhua Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hernia Repair ◽  
Mechanical Performance ◽  
Structural Parameters ◽  
Strength Properties ◽  
Open Loop ◽  
Burst Strength ◽  
Patch Application ◽  
Large Pore ◽  
Polypropylene Monofilament

This paper studied the relationship between the textile structure of warp knitted hernia repair meshes and their physico-mechanical properties to solve the problem of hernia patch application evaluation and clear the mechanism of hernia patch structure-performance for clinical application. Six different prototypes of large pore meshes were fabricated, including four kinds of meshes with different pore shapes: H (hexagonal), D (diamond), R (round) and P (pentagonal); and two kinds of meshes with inlays: HL (hexagonal with inlays) and DL (diamond with inlays), using the same medical grade polypropylene monofilament. All meshes were designed with the same walewise density and coursewise density. Then the influence of other structural parameters on the physico-mechanical properties of the meshes was analysed. The physico-mechanical properties of these meshes tested meet the requirements of hernia repair, except mesh DL, whose tear resistance strength (12.93 ± 2.44 N in the transverse direction) was not enough. Mesh R and P demonstrated less anisotropy, and they exhibited similar physico-mechanical properties. These four kinds of meshes without inlays demonstrated similar ball burst strength properties, but mesh HL and DL exhibited better ball burst strength than the others. All in all, uniform structures are expected to result in less anisotropy, and meshes with inlays, to some extent, possess higher mechanical properties. And the ratio of open loop number to closed loop number in a repetition of weave of fabric has marked effect on the physico-mechanical properties. Thus we can meet the demands of specific patients and particular repair sites by designing various meshes with appropriate textile structures.

Role of the phase composition of tungsten containing hard alloys in the formation of a layer of titanium carbide in gas titanizing

1989 ◽  
Vol 28 (7) ◽  
pp. 574-578
Author(s):  
B. V. Zakharov ◽  
A. N. Minkevich ◽  
D. V. Pikunov ◽  
�. R. Ton� ◽  
E. D. Argasova
Keyword(s):  
Phase Composition ◽  
Titanium Carbide ◽  
Hard Alloys

Synthesis of titanium carbide and titanium diboride for metal processing and ceramics production

2021 ◽  
Vol 23 (4) ◽  
pp. 155-166
Author(s):  
Yuri Krutskii ◽  
◽  
Evgeny Maksimovskii ◽  
Roman Petrov ◽  
Olga Netskina ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Boron Carbide ◽  
Titanium Diboride ◽  
Cutting Tools ◽  
Hard Alloys ◽  
Titanium Oxides ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Highly Dispersed

Introduction. Titanium carbide and diboride are characterized by high values of hardness, chemical inertness and for this reason are widely used in modern technology. This paper provides information on the synthesis of titanium carbide and diboride by carbothermal and carbide-boron methods, respectively, on the use of titanium carbide as an abrasive and in the manufacture of tungsten-free hard alloys, carbide steels, wear-resistant coatings, as well as titanium diboride in the production of cutting tools and ceramics based on boron carbide The aim of this work is to study the processes of synthesis of highly dispersed powders of titanium carbide and diboride, which are promising for the manufacture of cutting tools, wear-resistant coatings, abrasives and ceramics. Research methods. Titanium oxide TiO2, nanofibrous carbon (NFC), and highly dispersed boron carbide were used as reagents for the synthesis of titanium carbide and diboride. Experiments to obtain titanium carbide were carried out in a resistance furnace, and titanium diboride in an induction furnace. X-ray studies of the phase composition of titanium carbide and diboride samples were carried out on an ARL X-TRA diffractometer (Thermo Electron SA). The determination of the content of titanium and impurities in the samples of titanium carbide and diboride was carried out by the X-ray spectral fluorescence method on an ARL-Advant'x analyzer. The total carbon content in the titanium carbide samples was determined on an S-144 device from LECO. The content of boron and other elements for titanium diboride samples was determined by inductively coupled plasma atomic emission spectrometry (ICP AES) on an IRIS Advantage spectrometer (Thermo Jarrell Ash Corporation). The surface morphology and particle sizes of the samples were studied using a Carl Zeiss Sigma scanning electron microscope (Carl Zeiss). The determination of the particle/aggregate size distribution was performed on a MicroSizer 201 laser analyzer (BA Instruments). Results. The paper proposes technological processes for obtaining highly dispersed powders of titanium carbide and diboride. The optimum synthesis temperature for titanium carbide is 2,000…2,100 oC, and for titanium diboride 1,600…1,700 oC. The content of the basic substance is at the level of 97.5…98.0 wt. %. Discussion. A possible mechanism for the formation of titanium carbide and diboride is proposed, which consists in the transfer of vapors of titanium oxides to the surface of solid carbon (synthesis of titanium carbide) and vapors of boron and titanium oxides to the surface of solid carbon (synthesis of titanium diboride). Due to the high purity and dispersion values, the resulting titanium carbide powder can be used as an abrasive material and for the manufacture of tungsten-free hard alloys, carbide steels, wear-resistant coatings, and titanium diboride powder can be used for the preparation of cutting tools and ceramics based on boron carbide.

High-temperature friction and wear of titanium carbide hard alloys with an addition of a solid lubricant

1998 ◽  
Vol 37 (7-8) ◽  
pp. 421-424 ◽  
Author(s):  
Yu. G. Tkachenko ◽  
D. Z. Yurchenko ◽  
A. S. Sibel’ ◽  
L. M. Murzin
Keyword(s):  
High Temperature ◽  
Titanium Carbide ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Hard Alloys

Testing and Modeling the Tensile Strength Behavior of Glass Fibers, Fiber Bundles and Fiber Mat

2008 ◽  
Vol 589 ◽  
pp. 227-232 ◽  
Author(s):  
Kolos Molnár ◽  
Zoltán Gombos ◽  
László Mihály Vas
Keyword(s):  
Tensile Strength ◽  
Structural Parameters ◽  
Glass Fibers ◽  
Strength Properties ◽  
Modeling Method ◽  
Fiber Bundles ◽  
Failure Behavior ◽  
Fiber Mats ◽  
Tensile Tester ◽  
Structural Levels

In this paper glass fibers, chopped roving pieces, and fiber mats were tested in case of emulsion bonded glass fiber mat samples. Relationships between the tensile strength properties of the different structural levels of the fiber mats were studied and fiber bundles as structural elements of fiber mats were modeled by idealized statistical fiber bundles developed by the Department of Polymer Engineering, BUTE. The geometrical and mechanical measurements were carried out by image processing methods and a computer aided tensile tester. The results proved that the modeling method gave a tool in understanding the failure behavior of the fiber mat samples and studying the effect of the structural parameters. The applicability of the modeling method is demonstrated by the good agreement with some measurements.

Use of hard alloys based on titanium carbide as wear-resistant materials and cutting tools

1977 ◽  
Vol 16 (5) ◽  
pp. 394-397
Author(s):  
N. N. Sereda ◽  
M. S. Koval'chenko ◽  
I. T. Belik ◽  
V. G. Solomenko ◽  
V. V. Uvarov ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Cutting Tools ◽  
Hard Alloys ◽  
Wear Resistant

scholarly journals Study of the Effect of Doping ZrO2 Ceramics with MgO to Increase the Resistance to Polymorphic Transformations under the Action of Irradiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3172
Author(s):  
Alisher E. Kurakhmedov ◽  
Mahambet Alin ◽  
Adilet M. Temir ◽  
Igor A. Ivanov ◽  
Yeugeniy V. Bikhert ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Strength Properties ◽  
Polymorphic Transformations ◽  
Surface Layers ◽  
Zro2 Phase ◽  
Composition Formation ◽  
Radiation Swelling ◽  
The Stability ◽  
New Generation ◽  
Effect Of Doping

The purpose of this study is to assess the effect of doping ZrO2 ceramics with MgO on radiation swelling and polymorphic transformations, as a result of irradiation with heavy ions. Interest in these types of materials is due to the great prospects for their use as structural materials for new-generation reactors. The study established the dependences of the phase composition formation and changes in the structural parameters following a change in the concentration of MgO. It has been established that the main mechanism for changing the structural properties of ceramics is the displacement of the cubic c-ZrO2 phase by the Zr0.9Mg0.1O2 substitution phase, which leads to an increase in the stability of ceramic properties to irradiation. It has been determined that an increase in MgO concentration leads to the formation of an impurity phase Zr0.9Mg0.1O2 due to the type of substitution, resulting in changes to the structural parameters of ceramics. During studies of changes in the strength properties of irradiated ceramics, it was found that the formation of a phase in the Zr0.9Mg0.1O2 structure leads to an increase in the resistance to cracking and embrittlement of the surface layers of ceramics.

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