MARC details
| 000 -LEADER |
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04588ntm a2200337 i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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MY-KuUP |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20251125111025.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS |
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t||||fr|||| 000 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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ta |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250210t20242024my a|||fr|||| 000 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0010007 (Local) |
| Qualifying information |
Hardback |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMPSA |
| Language of cataloging |
eng |
| Transcribing agency |
UMPSA |
| Description conventions |
rda |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
FTKPM .S94 2024 r Thesis |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Lim Syh Kai, |
| Relator term |
author. |
| 245 10 - TITLE STATEMENT |
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| Title |
Graphene hybrid with Al₂O₃ base spent lubricants/eg (C₂H₆O₂) as nanolubri-coolants for machining Ti6Al4V material |
| Statement of responsibility, etc. |
Lim Syh Kai |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Place of production, publication, distribution, manufacture |
Kuantan, Pahang : |
| Name of producer, publisher, distributor, manufacturer |
UMPSA , |
| Date of production, publication, distribution, manufacture, or copyright notice |
2024 |
| 264 #4 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Date of production, publication, distribution, manufacture, or copyright notice |
© 2024 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xix, 192 pages : |
| Other physical details |
illustration ; |
| Dimensions |
30 cm. + |
| Accompanying material |
1 CD-ROM |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| Content type term |
text |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| Media type term |
unmediated |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| Carrier type term |
volume |
| 347 ## - DIGITAL FILE CHARACTERISTICS |
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| Source |
rda |
| File type |
text file |
| Encoding format |
PDF |
| 500 ## - GENERAL NOTE |
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| General note |
Faculty of Manufacturing & Mechatronics Engineering Technology |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2024 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliographical references |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Lubricants usage for lubrication and cooling in the manufacturing engineering industry due to their pleasant attributes of good lubricity, high quality viscosity index and production desirable mechanical parts. However, failure of conventional lubricants at elevated temperatures and machining hard-to-process material such as Ti6Al4V, which exhibited poor thermal conductivity property and concentrated heat generation during machining process caused chip welding to accelerate insert wear. The performance limitation can be ameliorated by introducing hybrid nanoparticles to enhance the thermophysical and anti-wear properties of lubricants. The research aim to newly formulate hybrid nanolubri-coolants using graphene (G) and aluminium oxide (Al2O3) nanoparticles with the objectives to investigate the thermophysical and tribological properties as well as introducing the optimum hybrid ratio and concentration of nanolubri-coolant through minimum quantity cooling lubrication (MQCL) system in machining Ti6Al4V workpiece. Initially, the G-Al2O3 nanolubri-coolant was prepared at different composition ratio of 80:20, 60:40, 40:60 and 20:80 (ratio of G to Al2O3 in volume percent) for a constant 1.0% volume concentration. Next, the thermal conductivity, dynamic viscosity and density of nanolubri-coolants were measured using analytical laboratory equipment, whereas the kinematic viscosity and viscosity index (VI) were calculated by using mathematical equation and ASTM D2270 standard chart calculation. The tribological performance investigation was conducted in four-ball tribotester machine with specific circumstances according to ASTM D4172 standard. Results showed that among 4 composition ratios, the hybrid ratio of 60:40 was observed to be the most effective composition ratio according to the evaluation of thermophysical properties of thermal conductivity enhancement, dynamic viscosity enhancement, high value of VI and evaluation of tribological performances in terms of superior friction reduction, lower worn scar diameter and excellent surface quality. Furthermore, the G-Al2O3 hybrid nanolubri-coolant was prepared at different volume concentration from 0.5% to 1.5% for optimum composition ratio based on the outcomes of thermophysical and tribological properties evaluation and compared with the base lubricants. The turning experiments were performed using best concentration of G-Al2O3 hybrid nanolubri-coolants in MQCL system to evaluate the machinability performance of cutting Ti6Al4V. In the MQCL turning process, the hybrid nanolubri-coolants obtained maximum reduction of machining temperature by 31% and the cutting insert wear significantly reduced to 40.5%, minimize surface roughness as well as extended cutting insert life by 33.9%. Finally, it was recommended to formulate the G-Al2O3 hybrid nanolubri-coolants with hybrid ratio of 60:40 (60% G to 40% Al2O3) for application in machining of hard-to-cut material, Ti6Al4V workpiece due to this lubricant capable to formation of protective tribo-film and ball rolling mechanism effects as well as superior hybrid cooling lubrication that has been established in this research provided another alternative to the world dominating mineral oil based lubricants for more sustainable manufacturing environment. |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
Faculty of Manufacturing & Mechatronics Engineering Technology |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and colleges |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Theses |
| General subdivision |
Dissertations |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Thesis |