Why is graphite used as a lubricant and diamond as an abrasive?

The graphite is made up of layers or sheets and with a solvent absorbed in between these layers they can slip over each other, thus creating the lubricant effect. The diamond is amongst one of the hardest materials we know because the carbon is bound very well to each other.

Why diamond is used as an abrasive?

Diamond is used as an abrasiveIn diamond carbon is sp3 hybridized. … It is very difficult to break this extended covalent bonding and for this reason diamond is the hardest substance known. Thus it is used as an abrasive and for cutting tools.

Why graphite is used as lubricants?

The carbon atoms are strongly bonded together in sheets. Because the bonds between the sheets are weak, graphite shows lower shearing strength under friction force. Thus it can be used as a solid lubricant and has become one of traditional and primary solid lubrication materials.

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Is graphite used as abrasive?

Graphite is used as a lubricant but diamond is used as an abrasive.

Are diamond and graphite abrasive?

Both diamond and graphite are used as abrasives. … The carbon atoms in both graphite and diamond have four single covalent bonds.

What is abrasive example?

The hardest abrasive material present in nature is the diamond. There are also other materials of both natural and synthetic origin, such as silicon carbide, corundum and zirconium. … Examples are abrasive paper sheets (also known as sandpaper), abrasive strips and more.

What are abrasive particles?

Abrasive particles are projected with high velocity at the workpiece surface to remove surface films, such as oxides, and to impart to the surface a uniformly mat surface texture. In grit blasting, the particles are irregularly shaped. In shot blasting, the particles are approximately spherical.

What are the difference between diamond and graphite?

For example, Graphite and diamond are two different allotropes of carbon.

Explain the difference in properties of diamond and graphite on the basis of their structures.

1) It has a crystalline structure. 1) It has a layered structure.
2) It is made up of tetrahedral units. 2) It has a planar geometry.

Why is graphite used as a lubricant GCSE?

Graphite has delocalised electrons, just like metals. … The forces between the layers in graphite are weak. This means that the layers can slide over each other. This makes graphite slippery, so it is useful as a lubricant .

Why is graphite used as a lubricant class11?

Graphite has a layered structure and different layers of graphite are bonded to each other by weak van der Waals’ forces. These layers can slide over each other. Graphite is soft and slippery. Therefore, graphite can be used as a lubricant.

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Are diamond and graphite lubricant?

Graphite is used as a lubricant in fast-moving elements of equipment because of its softness and non-volatility. It’s used to lubricate equipment parts that operate at high temperatures. Diamond, on the other hand, is a very hard substance and so cannot be used as a lubricant.

Is diamond a good thermal conductor?

Diamond is the most highly prized of gemstones. … Along with its carbon cousins graphite and graphene, diamond is the best thermal conductor around room temperature, having thermal conductivity of more than 2,000 watts per meter per Kelvin, which is five times higher than the best metals such as copper.

Can graphite be used as an electrode?

Graphite rods are used as electrodes in electrolysis because graphite’s structure enables it to be an excellent conductor. The high number of delocalized electrons allows electricity to pass through graphite rapidly.

Why do diamond and graphite differ in physical properties?

It’s because the carbon atoms are rearranged in a specific geometric shape that gives the diamond its properties. … Graphite however, is when the carbon atoms bond together in sheets – hexagonal-like lattice. Graphite is formed from the carbon atoms resulting from the metamorphism of minerals such as marble, quartz, etc.

What are the uses of diamond and graphite?

Diamond and graphite are used in a variety of applications. The atoms in graphite and diamond are strongly bonded with covalent bonds, forming different arrangements with each other. Diamonds are used in Jewelry making, construction, minor industrial applications, and surgeries.

How do diamond and graphite differ in their structures Is there any effect of structures on the nature of these?

But they differ in their structures. In diamond, all the four valence electrons of carbon atom are involved in the covalent bond formation with the electrons of neighbouring carbon atoms. In graphite, only three electrons participate in the bond formation while the fourth electron is free.

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