Comparison of Two Powder Processing Techniques on the Properties of Cu-NbC Composites

Long, Bui Duc; Othman, Radzali; Hussain, Zuhailawati; Umemoto, Minoru

doi:10.1155/2014/160580

Cited by 9 publications

(7 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest hardness values for ex-situ Cu-TiC and in-situ Cu-TiH2-C sintered at 700 and 950 • C are 181.6 and 206.5 HV, respectively. Furthermore, the electrical resistivity of the in-situ composite is 47.2% IACS, which is higher than that of in-situ Cu-NbC with the same reinforcement volume as that reported [35].…”

Section: Methodsmentioning

confidence: 40%

Microstructure and Electrical Property of Ex-Situ and In-Situ Copper Titanium Carbide Nanocomposites

Việt

Oanh

2020

Metals

View full text Add to dashboard Cite

In this study, ex-situ Cu-TiC nanocomposites of 1, 3 and 5 vol. % TiC and in-situ Cu-TiH2-C nanocomposites (corresponding to 5 vol. % TiC) were prepared using ball milling and spark plasma sintering methods. Powder mixtures were milled for 4 h at 400 rpm. As-milled Cu-TiC composite powders were consolidated under an applied pressure of 70 MPa. The phase composition, and microstructure of the composite samples were characterized by X-ray diffraction, and scanning electron microscope and transmission electron microscope techniques, respectively. With the increasing TiC content from 1 to 5 vol. %, the hardness of the ex-situ composites when sintered at 600 °C changed between 161.4 and 178.5 HV and the electrical conductivity decreased from 52.1 to 47.6% IACS. In-situ Cu-TiH2-C nanocomposite sintered at 950 °C had higher hardness and electrical conductivity than ex-situ Cu-TiC composite due to having a homogenous distribution of nano reinforcement particles and dense structure.

show abstract

Section: Methodsmentioning

confidence: 40%

Microstructure and Electrical Property of Ex-Situ and In-Situ Copper Titanium Carbide Nanocomposites

Việt

Oanh

2020

Metals

View full text Add to dashboard Cite

show abstract

“…Zuhailawati and coworkers published a series of studies on this composite 14–18 . They used the elemental mixture of Cu, Nb, and C in all their research and investigated various parameters including milling time, 12,15 sintering temperature of the as‐milled powder, 16 effect of adding ethanol in the milling as the process control agent, 14 and employing the high pressure torsion (HPT) process for compressing the composites 17,18 . NbC reinforcement was also synthesized in situ during a two‐step, long‐term mechanical milling of Cu+Nb+C mixture 13,19 .…”

Section: Introductionmentioning

confidence: 99%

The effects of NbC nanoparticles synthesized by combustion method on the mechanical properties of Cu–NbC nanocomposite

Moghim

Jalaly

Sadeghzadeh

2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In the first stage of this work, the master nanocomposite of niobium carbide (NbC)-Cu (ceramic-based nanocomposite) was synthesized by a mechanically induced magnesiothermic combustion in the Nb 2 O 5 /CuO/Mg/C system. Ignition time in this system was recorded to be ∼28 min of milling. In the second stage, appropriate amounts of NbC-Cu nanocomposite powder were mixed with pure copper powder to prepare Cu-based nanocomposite with 0, 5, 10, 15, and 20 volume fraction of NbC. The final metal matrix nanocomposite powder was sintered by spark plasma sintering method. The density of nanocomposite specimens decreased with increasing the percentage of NbC nanoparticles, while the microhardness of specimens increased with increasing nano-NbC content. Regarding the tensile test, the sample Cu-10 vol.% NbC nanocomposite with a strength of 372 MPa (∼63% higher than that of nonreinforced copper) was the best composition, and the nanocomposite strength decreased at higher NbC concentrations, mostly due to the agglomeration and nonhomogeneous distribution of reinforcing nanoparticles.

show abstract

“…The most common routes for particle-reinforced Cu matrix composites include casting and powder metallurgy methods. Powder metallurgy (PM) is preferred to casting because of low agglomeration, low segregation and good wettability [5,6]. PM processing includes mixing, pressing and sintering [7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Physical Properties of Hybrid Cu-Graphite Composites Prepared via Powder Metallurgy Technique

Mahdi¹,

Eaqoob²,

Muhialdeen³

2017

Tikrit j. eng. sci.

View full text Add to dashboard Cite

Copper -graphite composites are widely used in a great number of engineering applications such as brushes, switches, sliding bearings, self-lubricating bearings, etc. due to their good thermal and electrical conductivity and excellent tribological properties as compared with other structural materials. There are ongoing attempts in manufacturing copper composites with better properties to enhance their efficiency and increase their effective life. Present research aims to prepare hybrid 95wt.% copper -5wt.% graphite composites reinforced with yttria and tin particles by powder metallurgy technique and to study their effects on mechanical and physical properties of the prepared composites. Powder mixture was mixed by ball mill mixer at 100rpm for 120min with (5/1) balls to powder ratio. The powder mixture was cold pressed at 700MPa for 30sec, followed by sintering at 900 ˚C for one hour. In the first stage, Yttria(Y2O3) was added with (2,4,6,8,10) wt% to pure copper (Cu) and to (95%Cu-5%Gr) matrices. Typical composite of this stage was ((95%Cu-5%Gr)-4%Y2O3. In the second stage, tin (Sn) was added with (2, 4, 6, 8, 10) wt% to pure copper and((95%Cu-5%Gr)-4%Y2O3 matrices. Typical composite of this stage was ((95%Cu-5%Gr)-4%Y2O3)-6%Sn. The results showed that hardness and true porosity of the composites increases with increasing yttria content. On the other hand, both thermal and electrical conductivity of the composites decreases with increasing yttria content. It was also found that (95 wt.% Cu-5 wt.% Gr) -Y2O3 composites have always lower wear rate than plain Cu-Y2O3 composites.

show abstract

Comparison of Two Powder Processing Techniques on the Properties of Cu-NbC Composites

Cited by 9 publications

References 38 publications

Microstructure and Electrical Property of Ex-Situ and In-Situ Copper Titanium Carbide Nanocomposites

Microstructure and Electrical Property of Ex-Situ and In-Situ Copper Titanium Carbide Nanocomposites

The effects of NbC nanoparticles synthesized by combustion method on the mechanical properties of Cu–NbC nanocomposite

Mechanical and Physical Properties of Hybrid Cu-Graphite Composites Prepared via Powder Metallurgy Technique

Contact Info

Product

Resources

About