Development and Characterization of Graphene Oxide Induced Alumina Composite Using Powder Metallurgy (Record no. 612916)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02671nam a22001577a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 670 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Abuzar |
| 245 ## - TITLE STATEMENT | |
| Title | Development and Characterization of Graphene Oxide Induced Alumina Composite Using Powder Metallurgy |
| Statement of responsibility, etc. | Abuzar |
| 264 ## - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Place of production, publication, distribution, manufacture | Islamabad : |
| Name of producer, publisher, distributor, manufacturer | SMME- NUST; |
| Date of production, publication, distribution, manufacture, or copyright notice | 2025. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 124p. |
| Other physical details | Soft Copy |
| Dimensions | 30cm |
| 500 ## - GENERAL NOTE | |
| General note | Graphene oxide (GO)-reinforced alumina (Al2O3) composites have garnered significant<br/>attention for aerospace applications due to their enhanced mechanical properties. This<br/>study investigates the synthesis, sintering behaviour, and mechanical characterization<br/>of GO-alumina composites fabricated using powder metallurgy. GO concentrations of<br/>0.5, 0.9, and 1.2 wt.% were incorporated into an alumina matrix and processed via<br/>uniaxial cold pressing at 450 MPa, followed by liquid-phase sintering at 1500°C and<br/>1550°C for dwell times of 60 and 90 minutes.<br/>Material characterization through X-ray diffraction (XRD) confirmed the presence of<br/>beta or gamma alumina, while Raman spectroscopy demonstrated the structural<br/>integrity of GO within the composite. Scanning electron microscopy (SEM) revealed a<br/>uniform dispersion of GO at lower concentrations but agglomeration at 1.2 wt.%,<br/>adversely affecting densification and mechanical performance. The relative density of<br/>the composites decreased with increasing GO content due to the formation of porous<br/>regions and weak interfacial bonding. The highest relative density (91.45%) was<br/>observed in pure alumina sintered at 1550°C for 90 minutes, while GO-reinforced<br/>samples exhibited reduced densification efficiency. Vickers microhardness testing<br/>indicated peak hardness at 0.5 wt.% GO, reaching 1838 HV at 1550°C for 90 minutes.<br/>However, higher GO content (>0.9 wt.%) led to a decline in hardness due to increased<br/>porosity and structural defects.<br/>The research finding indicate the potential of GO-alumina composites for aerospace<br/>applications but also underscores the limitations of conventional liquid-phase sintering<br/>in achieving optimal densification and mechanical properties. Compared to Spark<br/>Plasma Sintering (SPS), which provides rapid heating, improved grain refinement, and<br/>reduced porosity, the current processing method resulted in lower densification and<br/>increased defect formation. Future work should explore SPS to mitigate agglomeration,<br/>enhance densification efficiency, and improve the overall performance of GO-alumina<br/>composites. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MS Design and Manufacturing Engineering |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Supervisor : Dr. Sadaqat Ali |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://10.250.8.41:8080/xmlui/handle/123456789/49856">http://10.250.8.41:8080/xmlui/handle/123456789/49856</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Thesis |
| Withdrawn status | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Koha item type |
|---|---|---|---|---|---|---|---|
| School of Mechanical & Manufacturing Engineering (SMME) | School of Mechanical & Manufacturing Engineering (SMME) | E-Books | 02/19/2025 | 670 | SMME-TH-1113 | Thesis |