{"title":"通过两步火花等离子烧结法提高铜-10 wt%石墨复合材料在添加铝时的性能","authors":"R. Khosravi Zeydabadi, M. Sobhani","doi":"10.1016/j.rinma.2025.100686","DOIUrl":null,"url":null,"abstract":"<div><div>In the present study, Cu-10 wt% graphite composites were fabricated using powder metallurgy and spark plasma sintering (SPS) combined with the two-step sintering (TSS) method. The impact of 2 wt% aluminum powder additive on the sintering process and the properties of the resulting composites was investigated. Various sintering schedules were applied to achieve optimal properties in the composites. Single-step sintering was conducted at temperatures of 550, 600, and 650 °C, while two-step sintering (TSS) involved an initial temperature (T<sub>1</sub>) of 600 °C followed by a second temperature (T<sub>2</sub>) of 550 °C. The composites prepared using the TSS method exhibited a minimum friction coefficient of 0.23 and showed lower weight loss in sliding wear tests. The hardness of the composites containing 2 wt% Al reached approximately 88.5 BHN, while the electrical conductivity decreased by about 10 % compared to composites without Al addition. X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) confirmed the formation of a solid solution of aluminum in the copper matrix during sintering. Microstructural observations revealed well-dispersed graphite particles within the matrix.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"26 ","pages":"Article 100686"},"PeriodicalIF":0.0000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced properties of the Cu-10 wt% graphite composites by two-step spark plasma sintering method at the presence of Al addition\",\"authors\":\"R. Khosravi Zeydabadi, M. Sobhani\",\"doi\":\"10.1016/j.rinma.2025.100686\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In the present study, Cu-10 wt% graphite composites were fabricated using powder metallurgy and spark plasma sintering (SPS) combined with the two-step sintering (TSS) method. The impact of 2 wt% aluminum powder additive on the sintering process and the properties of the resulting composites was investigated. Various sintering schedules were applied to achieve optimal properties in the composites. Single-step sintering was conducted at temperatures of 550, 600, and 650 °C, while two-step sintering (TSS) involved an initial temperature (T<sub>1</sub>) of 600 °C followed by a second temperature (T<sub>2</sub>) of 550 °C. The composites prepared using the TSS method exhibited a minimum friction coefficient of 0.23 and showed lower weight loss in sliding wear tests. The hardness of the composites containing 2 wt% Al reached approximately 88.5 BHN, while the electrical conductivity decreased by about 10 % compared to composites without Al addition. X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) confirmed the formation of a solid solution of aluminum in the copper matrix during sintering. Microstructural observations revealed well-dispersed graphite particles within the matrix.</div></div>\",\"PeriodicalId\":101087,\"journal\":{\"name\":\"Results in Materials\",\"volume\":\"26 \",\"pages\":\"Article 100686\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-03-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Results in Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2590048X25000317\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Results in Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2590048X25000317","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Enhanced properties of the Cu-10 wt% graphite composites by two-step spark plasma sintering method at the presence of Al addition
In the present study, Cu-10 wt% graphite composites were fabricated using powder metallurgy and spark plasma sintering (SPS) combined with the two-step sintering (TSS) method. The impact of 2 wt% aluminum powder additive on the sintering process and the properties of the resulting composites was investigated. Various sintering schedules were applied to achieve optimal properties in the composites. Single-step sintering was conducted at temperatures of 550, 600, and 650 °C, while two-step sintering (TSS) involved an initial temperature (T1) of 600 °C followed by a second temperature (T2) of 550 °C. The composites prepared using the TSS method exhibited a minimum friction coefficient of 0.23 and showed lower weight loss in sliding wear tests. The hardness of the composites containing 2 wt% Al reached approximately 88.5 BHN, while the electrical conductivity decreased by about 10 % compared to composites without Al addition. X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) confirmed the formation of a solid solution of aluminum in the copper matrix during sintering. Microstructural observations revealed well-dispersed graphite particles within the matrix.
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