Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites
Abstract Metal-bonded grinding tools are commonly based on copper as bond material and possess low porosity. The powder metallurgic fabrication and the applied process parameters have a high influence on the mechanical properties of these grinding layers. In this study, Cu–diamond composites are fab...
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| Format: | Article |
| Language: | English |
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Springer
2022-05-01
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| Series: | SN Applied Sciences |
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| Online Access: | https://doi.org/10.1007/s42452-022-05048-2 |
| _version_ | 1818008196015456256 |
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| author | Berend Denkena Benjamin Bergmann Roman Lang |
| author_facet | Berend Denkena Benjamin Bergmann Roman Lang |
| author_sort | Berend Denkena |
| collection | DOAJ |
| description | Abstract Metal-bonded grinding tools are commonly based on copper as bond material and possess low porosity. The powder metallurgic fabrication and the applied process parameters have a high influence on the mechanical properties of these grinding layers. In this study, Cu–diamond composites are fabricated through Field Assisted Sintering Technology with a variation of holding time, temperature, pressure, and chromium powder particle size. The addition of chromium to these composites can ensure a higher adhesion of the diamonds through carbide formation within the interface of the diamonds and the copper bonding matrix. The coating of diamond with chromium-carbide is mainly controlled by the chromium powder particle size, which leads to a higher critical bond strength with decreasing particle size. Maximum critical bond strength of 463 N/mm2 is reached using chromium with an average particle size of 10 µm. Increasing holding time decreases porosity and increases the critical bond strength of the composites. An increase of sintering temperature from 900 to 1040 °C leads to a decrease of porosity due to local melting of the copper. The interlocking of diamonds due to their high concentration of 50 vol% within the composites results in a relatively high porosity above 7%. Article Highlights Modelling of the influence of sintering temperature, sintering time and chromium particle size on the critical bond strength Addition of chromium results in an in-situ formed carbide-layer when sintering above a temperature of 900 °C Smaller chromium particle sizes significant increase the mechanical stability of CuCr–diamond composites |
| first_indexed | 2024-04-14T05:26:04Z |
| format | Article |
| id | doaj.art-287ec62ef2a24f8b967559c95cd47ba8 |
| institution | Directory Open Access Journal |
| issn | 2523-3963 2523-3971 |
| language | English |
| last_indexed | 2024-04-14T05:26:04Z |
| publishDate | 2022-05-01 |
| publisher | Springer |
| record_format | Article |
| series | SN Applied Sciences |
| spelling | doaj.art-287ec62ef2a24f8b967559c95cd47ba82022-12-22T02:09:57ZengSpringerSN Applied Sciences2523-39632523-39712022-05-014611010.1007/s42452-022-05048-2Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond compositesBerend Denkena0Benjamin Bergmann1Roman Lang2Institute of Production Engineering and Machine Tools, Leibniz Universität HannoverInstitute of Production Engineering and Machine Tools, Leibniz Universität HannoverInstitute of Production Engineering and Machine Tools, Leibniz Universität HannoverAbstract Metal-bonded grinding tools are commonly based on copper as bond material and possess low porosity. The powder metallurgic fabrication and the applied process parameters have a high influence on the mechanical properties of these grinding layers. In this study, Cu–diamond composites are fabricated through Field Assisted Sintering Technology with a variation of holding time, temperature, pressure, and chromium powder particle size. The addition of chromium to these composites can ensure a higher adhesion of the diamonds through carbide formation within the interface of the diamonds and the copper bonding matrix. The coating of diamond with chromium-carbide is mainly controlled by the chromium powder particle size, which leads to a higher critical bond strength with decreasing particle size. Maximum critical bond strength of 463 N/mm2 is reached using chromium with an average particle size of 10 µm. Increasing holding time decreases porosity and increases the critical bond strength of the composites. An increase of sintering temperature from 900 to 1040 °C leads to a decrease of porosity due to local melting of the copper. The interlocking of diamonds due to their high concentration of 50 vol% within the composites results in a relatively high porosity above 7%. Article Highlights Modelling of the influence of sintering temperature, sintering time and chromium particle size on the critical bond strength Addition of chromium results in an in-situ formed carbide-layer when sintering above a temperature of 900 °C Smaller chromium particle sizes significant increase the mechanical stability of CuCr–diamond compositeshttps://doi.org/10.1007/s42452-022-05048-2CarbidesCompositesSynthetic diamondHigh pressure high temperature (HTHP)AbrasionInterface characterization |
| spellingShingle | Berend Denkena Benjamin Bergmann Roman Lang Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites SN Applied Sciences Carbides Composites Synthetic diamond High pressure high temperature (HTHP) Abrasion Interface characterization |
| title | Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites |
| title_full | Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites |
| title_fullStr | Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites |
| title_full_unstemmed | Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites |
| title_short | Influence of the powder metallurgy route on the mechanical properties of Cu–Cr–diamond composites |
| title_sort | influence of the powder metallurgy route on the mechanical properties of cu cr diamond composites |
| topic | Carbides Composites Synthetic diamond High pressure high temperature (HTHP) Abrasion Interface characterization |
| url | https://doi.org/10.1007/s42452-022-05048-2 |
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