Electrodischarge machining of silicon nitride composites and silicon carbide composites

The paper presents the results of physical and mechanical properties of the and Si3N4 and SiC matrix ceramics with additives of good electrical conductivity carbides, nitrides and borides phases. The density, Young’s modulus, hardness HV1 and electrical conductivity of each material were investigated. Ceramic composite materials with the participation of the conductive phases have been produced using SPS (spark plasma sintering) method. Materials characterized by good electrical conductivity were shaped using EDM (electro discharge machining) method.

Download Full-text

EDM processing of sintered ceramic materials using the SPS method

Mechanik ◽

10.17814/mechanik.2018.3.39 ◽

2018 ◽

Vol 91 (3) ◽

pp. 240-243

Author(s):

Andrzej Nowakowski ◽

Tadeusz Krzywda ◽

Piotr Putyra

Keyword(s):

Electrical Conductivity ◽

Ceramic Composite ◽

Physical And Mechanical Properties ◽

Ceramic Materials ◽

Sintered Ceramic ◽

Electro Discharge Machining ◽

Plasma Sintering ◽

Spark Plasma ◽

Si3n4 Matrix ◽

Sintering Method

Presented are the analysis of physical and mechanical properties of the Al2O3, SiC and Si3N4 matrix ceramics with additives of good electrical conductivity phases and TiB2 matrix ceramics. The density, Young’s modulus, hardness HV1 and electrical conductivity of each material were investigated. Ceramic composite materials with the participation of the conductive phases have been produced using SPS (spark plasma sintering) method. Materials characterized by good electrical conductivity were shaped using EDM (electro discharge machining) method.

Download Full-text

Thermophysical Properties of Silicon-Carbide-Based Ceramic Composite Materials Obtained by Spark Plasma Sintering (SPS)

Glass and Ceramics ◽

10.1007/s10717-019-00082-w ◽

2019 ◽

Vol 75 (9-10) ◽

pp. 340-344

Author(s):

Yu. V. Loshchinin ◽

Yu. E. Lebedeva ◽

A. V. Slavin

Keyword(s):

Silicon Carbide ◽

Composite Materials ◽

Spark Plasma Sintering ◽

Thermophysical Properties ◽

Ceramic Composite ◽

Plasma Sintering ◽

Spark Plasma ◽

Ceramic Composite Materials

Download Full-text

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 ◽

10.3390/ma14133558 ◽

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.

Download Full-text

Microstructure and Mechanical Properties of Spark Plasma Sintered ZrO2-Al2O3-TiC0.5N0.5 Nanocomposites

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.106.153 ◽

2005 ◽

Vol 106 ◽

pp. 153-160 ◽

Cited By ~ 3

Author(s):

Kim Vanmeensel ◽

K.Y. Sastry ◽

J. Hennicke ◽

Guy Anné ◽

Dongtao Jiang ◽

...

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Fracture Toughness ◽

Powder Processing ◽

Processing Technique ◽

Conductive Composites ◽

Processing Times ◽

Electro Discharge Machining ◽

Plasma Sintering ◽

Spark Plasma

Future materials for wear resistant components require a combination of excellent mechanical properties such as hardness and toughness, short processing times and good electrical conductivity to facilitate shaping by electro discharge machining (EDM). In this work, the hardness and fracture toughness of t-ZrO2 based electro conductive composites was optimised, while short processing times below 20 minutes using spark plasma sintering were sufficient to obtain near fully dense materials. The influence of powder processing technique using TiC0.5N0.5 as the starting powder and yttria as a stabiliser on the mechanical properties of ZrO2-TiC0.5N0.5-Al2O3 based composites was investigated. Fully dense Y-TZP based composites possessed an excellent toughness of 9.2 MPa.m1/2 and an increased Vickers hardness of 1397 kg/mm².

Download Full-text

Electrical Conductivity of Cu and Cu-2vol.% Nb Powders and the Effect of Varying Sintering Temperatures on their Mechanical Properties Using Spark Plasma Sintering

Silicon ◽

10.1007/s12633-017-9578-1 ◽

2017 ◽

Vol 9 (6) ◽

pp. 855-865 ◽

Cited By ~ 3

Author(s):

A. A. Eze ◽

T. Jamiru ◽

E. R. Sadiku ◽

S. Diouf ◽

M. O. Durowoju ◽

...

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Spark Plasma Sintering ◽

Plasma Sintering ◽

Spark Plasma

Download Full-text

Physical, mechanical properties and wear resistance of iron-base matrix materials for sintered diamond tools fabricated by HP and SPS

Mechanik ◽

10.17814/mechanik.2018.10.140 ◽

2018 ◽

Vol 91 (10) ◽

pp. 846-849

Author(s):

Elżbieta Bączek

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Metal Matrix ◽

Physical And Mechanical Properties ◽

Full Density ◽

Matrix Composites ◽

Plasma Sintering ◽

Base Matrix ◽

Spark Plasma ◽

Sintered Diamond

Metal matrix composites were prepared by hot pressing (HP) and spark plasma sintering (SPS) techniques. Ball-milled ironbase powders were consolidated to near full density by these methods at 900°C. The physical and mechanical properties of the resulting composites were investigated. The specimens were tested for resistance to both 3-body and 2-body abrasion. The composites obtained by HP method (at 900°C/35 MPa) had higher density, hardness and resistance to abrasion than those obtained by SPS method.

Download Full-text