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RISS 인기검색어
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- 저자 : Mohammad Mahdi Kalantarian (검색결과 1 건)
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Synthesize of V4AlC3 Based MAX Phase Composites by Reactive Spark Plasma Sintering of V2O5:Al:C
Leila Sadeghi,Mansour Razavi,Mohammad Mahdi Kalantarian,Mohammad Reza Rahimipour,Mohsen Hossein‑Zadeh 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12
In this research V4AlC3based composites were synthesized by reactive spark plasma sintering (RSPS) method. V2O5:Al:Cstarting materials with molar ratios of 1:6:1.5 and 1:7:1.5 were heat treated at 1400 °C. Final composition, microstructural,physical, mechanical and tribological properties of the prepared composites were compared. The X-ray diffraction analysisresults showed that the formation of V4AlC3as main phase alongside Al2O3and V2AlCby-products. Increasing the Al contentfrom 6 moles to 7 moles led to formation of VC0.845and Al2O3main phases as well as V4AlC3and V2AlCminor phases in thissample due to extraction of Al from die during RSPS operation. Microstructural studies revealed that the uniform distributionof the phases with low amount of porosities. The layered microstructure of the composites confirmed the formation ofMAX phases. Higher bending strength and is achieved for the synthesized composite prepared by 7 moles Al (490 ± 5 MPa)than the composite prepared with 6 moles Al (375 ± 11 MPa). The composite prepared with 7 moles Al also exhibited lowerwear rate (3.7 × 10− 5 mm3/Nm) than that of prepared with 6 moles Al (2.4 × 10− 4 mm3/Nm). Microstructural studies of theworn surfaces indicated that tribo oxidation is dominant mechanism for both fabricated composites.
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