Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy
This paper presents an experimental study of Cu-Mo alloys prepared by powder metallurgy (PM) method. Also, improving the dispersion and wettability of Mo in the Cu matrix was aimed. Mo particles were added by 0.24, 0.48, 0.73 and 0.97% volume fraction to Cu powder. The mixture was mechanically mille...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac209a |
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| author | M Ahmadein Omayma A El-Kady M M Mohammed Fadl A Essa Naser A Alsaleh Joy Djuansjah Ammar H Elsheikh |
| author_facet | M Ahmadein Omayma A El-Kady M M Mohammed Fadl A Essa Naser A Alsaleh Joy Djuansjah Ammar H Elsheikh |
| author_sort | M Ahmadein |
| collection | DOAJ |
| description | This paper presents an experimental study of Cu-Mo alloys prepared by powder metallurgy (PM) method. Also, improving the dispersion and wettability of Mo in the Cu matrix was aimed. Mo particles were added by 0.24, 0.48, 0.73 and 0.97% volume fraction to Cu powder. The mixture was mechanically milled by planetary ball mill at a rotational speed of 140 rpm for 24 h under hydrogen atmosphere, with milling ball size of ∼25 times the size of the metal powders. Liquid acetone was utilized as a process control agent (PCA). Paraffin wax (0.5 wt%) was used to decrease the friction with die during the compaction process. The mixture of the blended powder was compacted at ambient temperature under three different pressures (400, 600 and 800 MPa) and then sintered in a vacuum furnace at 1000 °C for 1 h by a heating rate of 5 °C min ^−1 . The microstructure examination showed a homogeneous dispersion of Mo particles within the Cu matrix with no evidence of new phases formation during the sintering process. Also, the relative density of samples has been increased by increasing both of Mo content and the compaction pressure. The results revealed that the compaction pressure of 600 MPa was the most suitable pressure as it gave the highest densification. Cu—0.97% volume fraction Mo alloy samples exhibited finer Mo particles with a homogenous distribution in the Cu matrix and well bonding with the Cu particles. The microhardness was increased gradually by increasing Mo wt%, while the compressive strength was decreased by increasing the Mo contents. Both the electrical and thermal conductivities were decreased gradually by the addition of Mo. While the coefficient of thermal expansion (CTE) was decreased by Mo addition. |
| first_indexed | 2024-03-12T15:42:02Z |
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| id | doaj.art-4eb0c7b9da364600bc5b5f178e97cfca |
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| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:42:02Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-4eb0c7b9da364600bc5b5f178e97cfca2023-08-09T15:55:07ZengIOP PublishingMaterials Research Express2053-15912021-01-018909650210.1088/2053-1591/ac209aImproving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgyM Ahmadein0Omayma A El-Kady1M M Mohammed2Fadl A Essa3https://orcid.org/0000-0002-3446-1695Naser A Alsaleh4Joy Djuansjah5Ammar H Elsheikh6https://orcid.org/0000-0003-0944-4938Mechanical Engineering Department, Imam Mohammad Ibn Saud Islamic University , Saudi Arabia; Department of Production Engineering and Mechanical Design, Tanta University , EgyptPowder Metallurgy Division, Manufacturing Department, Central Metallurgical Research and Development Institute, EgyptMechanical Department, Faculty of Technology and Education, Beni-Suef University , EgyptMechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University , Kafrelsheikh 33516, EgyptMechanical Engineering Department, Imam Mohammad Ibn Saud Islamic University , Saudi ArabiaMechanical Engineering Department, Imam Mohammad Ibn Saud Islamic University , Saudi ArabiaDepartment of Production Engineering and Mechanical Design, Tanta University , EgyptThis paper presents an experimental study of Cu-Mo alloys prepared by powder metallurgy (PM) method. Also, improving the dispersion and wettability of Mo in the Cu matrix was aimed. Mo particles were added by 0.24, 0.48, 0.73 and 0.97% volume fraction to Cu powder. The mixture was mechanically milled by planetary ball mill at a rotational speed of 140 rpm for 24 h under hydrogen atmosphere, with milling ball size of ∼25 times the size of the metal powders. Liquid acetone was utilized as a process control agent (PCA). Paraffin wax (0.5 wt%) was used to decrease the friction with die during the compaction process. The mixture of the blended powder was compacted at ambient temperature under three different pressures (400, 600 and 800 MPa) and then sintered in a vacuum furnace at 1000 °C for 1 h by a heating rate of 5 °C min ^−1 . The microstructure examination showed a homogeneous dispersion of Mo particles within the Cu matrix with no evidence of new phases formation during the sintering process. Also, the relative density of samples has been increased by increasing both of Mo content and the compaction pressure. The results revealed that the compaction pressure of 600 MPa was the most suitable pressure as it gave the highest densification. Cu—0.97% volume fraction Mo alloy samples exhibited finer Mo particles with a homogenous distribution in the Cu matrix and well bonding with the Cu particles. The microhardness was increased gradually by increasing Mo wt%, while the compressive strength was decreased by increasing the Mo contents. Both the electrical and thermal conductivities were decreased gradually by the addition of Mo. While the coefficient of thermal expansion (CTE) was decreased by Mo addition.https://doi.org/10.1088/2053-1591/ac209acopper compositemolybdenum additivemicrostructurepowder metallurgymechanical propertiescoefficient of thermal expansion |
| spellingShingle | M Ahmadein Omayma A El-Kady M M Mohammed Fadl A Essa Naser A Alsaleh Joy Djuansjah Ammar H Elsheikh Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy Materials Research Express copper composite molybdenum additive microstructure powder metallurgy mechanical properties coefficient of thermal expansion |
| title | Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy |
| title_full | Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy |
| title_fullStr | Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy |
| title_full_unstemmed | Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy |
| title_short | Improving the mechanical properties and coefficient of thermal expansion of molybdenum-reinforced copper using powder metallurgy |
| title_sort | improving the mechanical properties and coefficient of thermal expansion of molybdenum reinforced copper using powder metallurgy |
| topic | copper composite molybdenum additive microstructure powder metallurgy mechanical properties coefficient of thermal expansion |
| url | https://doi.org/10.1088/2053-1591/ac209a |
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