Tribological behaviour of modified jatropha oil by mixing hexagonal boron nitride nanoparticles as a bio-based lubricant for machining processes

Investigation on the Tribological Behaviour of Modified Jatropha Oil with Hexagonal Boron Nitride Particles as a Metalworking Fluid for Machining Process

“…This process altered the long carbon chain of CJO into the long, complex and branched carbon chain of MJO5. It was indicated from the previous studies that MJO5 exhibits excellent machining performances [11,12]. MJO5 was mixed with hBN particles at various concentrations ranging between 0.05 to 0.5wt.% as shown in Table 1.…”

“…It can be seen that the addition of 0.05wt.% of hBN in MJO5 (MJO5a) had 4% and 3% reduction of WSD and COF compared to MJO5. The [12] WSD and COF of MJO5a were recorded at 1.186 mm and 0.0217. The presence of 0.05wt.% of hBN particles provides a thin lubrication film that allows the particles to change from sliding friction to the rolling friction as shown in Fig.…”

“…2(b) and 2(c). The hBN particles acted as the abrasive particles which caused an increase in friction and wear at the contact surfaces [12].…”

“…3 that MJO5 shows a reduction between 8 to 12% of the cutting force when compared to SE. It was expected that the modified lubricant, MJO5 has long, complex and branched of molecular chain that affect the lubrication properties [12]. MJO5 provide superior anti-wear and anti-friction ability and formed excellent lubrication film between the tool and workpiece.…”

“…The 0.05wt.% of hBN tends to separate the tool and workpiece during the machining process thus contributes in reducing the sliding friction. The hBN particles had altered the sliding friction into the rolling friction [12]. However, the increment of hBN particles in MJO5 causes abrasive wear to occur at the contact surfaces.…”