Abstract
Through this research paper, the influence of silicon nitride (Si3N4) particles incorporated with Al 7175 have been studied and reported for mechanical and physical behaviors. Various composites were fabricated by varying weight percentage (0 to 9%) of Si3N4 particles (as reinforcements) via vacuum sealed bottom pouring stir casting technique. Apart from the mechanical and physical behavioral evaluations, microstructural and micro-hardness was critically analyzed for different cast samples varying the weight percentages of silicon nitride particles. During micro-hardness evaluation of the cast samples, influence of variation in indentation load and dwell time was examined. The microstructural analysis illustrated the grain refinements with an addition of silicon nitride (Si3N4). The results exhibited significant improvements in micro-hardness, tensile strength and compressive strength by 14%, 22.76% and 25.67% respectively up to 7 weight percent with silicon nitride particles as the reinforcing phase. The micro-hardness values were observed to show a declining trend with an escalation in indentation load and dwell time.
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Abbreviations
- Al:
-
Aluminum
- AA:
-
Aluminum alloy
- AMMC:
-
Aluminum based metal matrix composite
- ASTM:
-
American Society for Testing and Materials
- XRD:
-
X-Ray diffraction
- VHN:
-
Vickers hardness number
- EDS:
-
Energy dispersive spectroscopy
- °C:
-
Degree celsius
- SEM:
-
Scanning electron microscope
- wt.%:
-
Weight percentage
- g/cc:
-
Gram per cubic centimeter
- gms.:
-
Grams
- RPM:
-
Revolution per minute
- Si3N4 :
-
Silicon nitride
- H2O:
-
Water
- HNO3 :
-
Nitric acid
- HCl:
-
Hydrochloric acid
- HF:
-
Hydrofluoric acid
- CR:
-
Crumb rubber
- Mg:
-
Magnesium
- MPa:
-
Mega-Pascal
- SF6 :
-
Sulphur hexafluoride
- UTM:
-
Universal Testing Machine
- %ge:
-
Percentage
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Singh, P., Walia, R.S. & Jawalkar, C.S. Influence of Si3N4 on micro structural, mechanical and physical features of Al-7175 based vacuum assisted bottom stir cast composites. Sādhanā 48, 180 (2023). https://doi.org/10.1007/s12046-023-02244-7
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DOI: https://doi.org/10.1007/s12046-023-02244-7