Structure, microstructure and mechanical properties of PM Fe–Cu–Co alloys

Barbosa, Anderson de Paula; Bobrovnitchii, G.S.; Skury, Ana Lúcia Diegues; Guimarães, Renan da Silva; Filgueira, Marcello

doi:10.1016/j.matdes.2009.07.027

Cited by 63 publications

(32 citation statements)

References 12 publications

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“…This can be explained by considering two aspects: (1) poor adhesion due to the absence of a coating on diamonds, (2) low compatibility iron/ diamond, especially in the absence of the elements already established for the diamond adhesion, such as cobalt and nickel. These explanations are in agreement with works 6,[19][20][21] . Figure 10 shows points analyzed by EDS.…”

Section: Compression Testssupporting

confidence: 94%

Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance

2015

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Section: Compression Testssupporting

confidence: 94%

Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance

2015

Self Cite

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“…This Cu effect is also verified for samples hot pressed at 35MPa/800 C/3 minutes -see NEXT100 versus Cobalite HDR and DIABASE V07. This Cu liquid phase aids someway the Fe-Co solid solution formation, as stated by Barbosa et al [15] -which is responsible for the hardness improvement.…”

Section: Methodsmentioning

confidence: 73%

“…It can be seen that density values from refs. [6] and [15] are quite superior than those from other works, just because these were measured by the water immersion methodArchimedes, thus neglecting the bulk porosity. The other works measured the densities by the conventional method hereby described, which consider the whole porosity.…”

Section: Methodsmentioning

confidence: 96%

Processing and characterization of a cobalt based alloy for use in diamond cutting tools

Oliveira¹,

Cabral²,

Guimarães³

et al. 2009

Materialwissenschaft Werkst

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Most of the alloys used as bonding matrix in diamond tools show a high content of cobalt -which is undesirable due to a series of reasons. In the last decade, some attempts were made towards the reduction of the Co content in these alloys. NEXT100J alloy (50wt%Cu-25wt%Fe-25wt%Co) by Eurotungstene is an example of it.This study aims to characterize the structure, microstructure and some mechanical properties of the NEXT100 -this is an comercial alloy widely used as bonding matrix for diamonds in cutting tools, and the informations about its properties are very scarce in the literature.The NEXT100 powder was hot pressed in a graphite matrix at 35MPa/800 C/3 minutes. It was performed structural and microstructural analyses by x-ray diffraction and scanning electon microscopy, respectivelly. Wear resistance and hardness HRB tests were carried out -these are the most important mechanical tests for a diamond bonding matrix. It was demonstrated that the samples presented good mechanical properties, XRD analysis showed the presence of two phases, Cu (CFC) and the solid solution a-Fe (CCC). Microstructural aspects are high densification, homogeneous distribution of phases, and little presence of pores.

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“…Cobalt has long been the most valued matrix material used for professional tools, due to its excellent diamond retention characteristics and sinterability of commercial Co powders. As the price of cobalt is highly unstable and increasingly contributes to the overall tool cost, the recent industrial trend is toward replacement of cobalt-containing matrices with other, preferably iron alloys produced by PM (Ref [1][2][3][4][5][6][7][8][9][10], by various routes (Ref 11,12). In our previous publications, we have identified and reported on such a promising alloy Fe-12% Mn-6.4% Cu-1.6% Sn-0.6% C (Ref [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Processing and Characterization of Fe-Mn-Cu-Sn-C Alloys Prepared by Ball Milling and Spark Plasma Sintering

Bączek

Konstanty

Romański

et al. 2018

J. of Materi Eng and Perform

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In this work, Fe-Mn-Cu-Sn-C alloys were prepared by means of powder metallurgy (PM). Powder mixtures were ball-milled for 8, 30 and 120 h and densified to < 1% porosity using spark plasma sintering (SPS) at 900°C and 35 MPa. After consolidation, all samples of the Fe alloys were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), hardness and flexural strength tests. Resistance to abrasive wear was evaluated in both three-body abrasion and two-body abrasion tests. The SEM observations revealed an evident dependence of grain size and microstructural homogeneity on milling time. The XRD analysis showed a marked increase in austenite content in the as-sintered specimens with milling time. Although the proportion of deformation-induced martensite was small, the strengthening effect of abrasion on the subsurface layer of the investigated alloys was clearly indicated by Knoop hardness measurements.

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Structure, microstructure and mechanical properties of PM Fe–Cu–Co alloys

Cited by 63 publications

References 12 publications

Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance

Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance

Processing and characterization of a cobalt based alloy for use in diamond cutting tools

Processing and Characterization of Fe-Mn-Cu-Sn-C Alloys Prepared by Ball Milling and Spark Plasma Sintering

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