Mondal, S and Chakraborty, S and Das, S (2018) Mechanical and Tribological Behavior of ZrB2-TiB2 System Prepared by Mechanical Activation Spark Plasma Sintering Technique. Journal of Materials Engineering and Performance, 27 (11). pp. 6040-6048. ISSN 1059-9495

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ZrB2-TiB2 system among varying amount of TiB2 loading (5, 10, 15, 20 and 30wt.%) was prepared by mechanical activation spark plasma sintering at 2100 degrees C for 15-min dwell time under 50MPa uniaxial pressure in argon atmosphere. The effect of the TiB2 loading on properties like physical, mechanical and tribological of the prepared samples was studied and evaluated with monolithic ZrB2 ceramic. Finally, almost fully dense samples (>96% of theoretical density) were fabricated. Microstructural observation and XRD phase analysis of sintered compact revealed that TiB2 completely went into the ZrB2 structure by formation of solid solution with ZrB2 phase. ZrB2-TiB2 (30wt.%) showed the highest Vickers micro-hardness (H-V) of 20.64GPa at 10N load. On addition of TiB2, the fracture toughness of the ZrB2-TiB2 improved up to 4.69 +/- 0.43MPam(1/2) over monolithic ZrB2 at 10N load. At 10N load, the scratch resistance coefficient, wear rate and wear resistance coefficient of ZrB2-TiB2 (30wt.%) reached a lowest value of 0.32, 0.35mm(3)/Nm and 0.008, respectively, at 10N load than other ZrB2 compositions.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Jan 2019 08:24
Last Modified: 16 Jan 2019 08:24

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