Mechanical and Tribological Behavior of ZrB{sub 2}-TiB{sub 2} System Prepared by Mechanical Activation Spark Plasma Sintering Technique
- Kalyani Government Engineering College, Mechanical Engineering Department (India)
ZrB{sub 2}-TiB{sub 2} system among varying amount of TiB{sub 2} loading (5, 10, 15, 20 and 30 wt.%) was prepared by mechanical activation spark plasma sintering at 2100 °C for 15-min dwell time under 50 MPa uniaxial pressure in argon atmosphere. The effect of the TiB{sub 2} loading on properties like physical, mechanical and tribological of the prepared samples was studied and evaluated with monolithic ZrB{sub 2} ceramic. Finally, almost fully dense samples (> 96% of theoretical density) were fabricated. Microstructural observation and XRD phase analysis of sintered compact revealed that TiB{sub 2} completely went into the ZrB{sub 2} structure by formation of solid solution with ZrB{sub 2} phase. ZrB{sub 2}-TiB{sub 2} (30 wt.%) showed the highest Vickers micro-hardness (H{sub V}) of 20.64 GPa at 10 N load. On addition of TiB{sub 2}, the fracture toughness of the ZrB{sub 2}-TiB{sub 2} improved up to 4.69 ± 0.43 MPa m{sup 1/2} over monolithic ZrB{sub 2} at 10 N load. At 10 N load, the scratch resistance coefficient, wear rate and wear resistance coefficient of ZrB{sub 2}-TiB{sub 2} (30 wt.%) reached a lowest value of 0.32, 0.35 mm{sup 3}/N m and 0.008, respectively, at 10 N load than other ZrB{sub 2} compositions.
- OSTI ID:
- 22863202
- Journal Information:
- Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 11 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
- Country of Publication:
- United States
- Language:
- English
Similar Records
PROPERTIES OF TiB$sub 2$-CrB$sub 2$-ZrB$sub 2$ SYSTEM
Tribological and mechanical comparison of sintered and HIPped PM212 - high temperature self-lubricating composites