Can graphite be used as a lubricant in space?

graphite cannot be used as a lubricant in space because a absence of external pressure transforms crysta;;ine graphite to - Science - - 6931722 | Meritnation.com.

Can graphite be used as a lubricant?

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.

What lubricants are used in space?

Many different liquid lubricants have been used in space: silicones, mineral oils, perfluoropolyalkylethers (PFPAE), polyalphaolefins, polyolesters, and multiply-alkylated cyclopentanes.

Does graphite work in vacuum?

Because water vapor is a requirement for lubrication, graphite is not effective in vacuum. Because it is electrically conductive, graphite can promote galvanic corrosion.

Why is graphite a better lubricant on moon?

Graphite needs humidity from the air to be slippery. Basically there is no moisture in the air for graphite to work very well. So, the Moon would not have an atmosphere and no moisture to allow the graphite to act as a lubricant. On the moon, there is lack of gravity on the motion of machines.

GCSE Science Revision Chemistry "Graphite"

Why is graphite a poor lubricant in outer space?

Since there is no atmosphere in space and hence there is no absorbed air and water between the layers of graphite and it act as poor lubricant.

Is graphite a good lubricant on Moon compared to earth?

Solution : Graphite is a better lubricant on the earth because of less graviional attraction on moon as compared to earth .

What happens if you smoke graphite?

Excessive exposure to graphite dust over extended periods of time can cause a chronic and more serious condition known as Graphitosis, which is a form of pneumoconiosis. This condition arises when inhaled particles of graphite are retained in the lungs and bronchi.

Is graphite toxic to breathe?

Effects of overexposure Repeated inhalation of natural graphite over a number of years may cause scarring of the lungs with such symptoms as chest tightness, shortness of breath, cough, black sputum, and pain. Natural graphite dust causes graphite pneumoconiosis.

What happens if you drink graphite?

Graphite is relatively nonpoisonous. There may be no symptoms. If symptoms do occur, they may include stomachache and vomiting, which could be from a bowel obstruction (blockage). The person may choke while swallowing the pencil.

What type of lubrication is used in space craft?

The following lubricants are commonly used in space- craft applications: oils; greases with extreme-pressure additives; solid films (burnished and vapor deposited) such as MoS2, Teflon, tri-cresyl phosphate, and SLPM'S; and hardened surfaces (e.g., case hardened, thermal sprayed, deep oxidized, or nitrided).

Do lubricants work in space?

Liquid lubricants for space applications need to have low vapor pressure (volatility) in order to withstand the high vacuum on orbit. Suitable lubricants include perfluoropolyethers, cyclopentanes and polyalphaolefins, mostly in the form of base oils for lubricating grease.

Which lubricant is used in rocket?

Blended oil is used as a lubricant for rockets and submarines. Explanation: Blended oils are generally used as liquid lubricants. It is made up of animal oils, vegetable oils or mineral oils.

Does graphite absorb oil?

As an alternative to polymer, expanded graphite (EG) has also been used to remove oil. Applying EG as an oil sorbent was first done by Toyoda and Inagaki. [12,13] EG is a good absorber for crude oil and its petroleum products, but not for many polar solvents, e.g., dimethyl sulfoxide or toluene.

Is diamond a lubricant?

Complete answer:

Diamond, on the other hand, is a very hard substance and so cannot be used as a lubricant.

Is graphite used as lubricant in nuclear reactor?

Generally, graphite is an ideal material for lubrication since it can withstand high temperatures and easily available. The nuclear reactor which uses graphite as moderator generally termed as graphite reactor in which graphite is used as a moderator to control the rate of reaction as we know it by the Wigner effect.

What does graphite taste like?

Decanter magazine defines graphite as tasting like pencil lead or lead-like minerality. Where does the taste come from? Some folks claim it comes from a wine's contact with wood during oak maturation.

What happens if I smoke pencil lead?

Lead poisoning can have serious effects on every part of the body. It can damage the nervous system, impair fertility, and lead to memory and concentration problems. Severe lead poisoning can lead to death. Smoking lead is particularly dangerous, because it allows the metal to be easily absorbed into the airways.

Is burning a pencil toxic?

When you burn graphite, you get two products: carbon monoxide and carbon dioxide. Carbon dioxide is also the gas that you exhale when you breathe. It is not poisonous per se, but if you have a fire and carbon dioxide displaces the air from the room, you cannot breathe carbon dioxide and you will suffocate.

Is graphite flammable?

GRAPHITE is non-flammable in bulk form, but combustible. A reducing agent. Mixtures of graphite dust and air are explosive when ignited. Reacts violently with very strong oxidizing agents such as fluorine, chlorine dioxide, and potassium peroxide.

Why was the reason of using graphite in military?

Military Applications

The Military uses graphite flakes to block electromagnetic waves that the enemy might detect and use to target troops in the field. Graphite flakes provide the military with protection beyond the visual and infrared spectrums (Driver 1993).

Does graphite explode?

Even when a fine dust of graphite is present, with the other four ingredients for explosion, it s incredibly hard to explode. If you simply heat a bar of graphite even in air then there is essentially no risk from the graphite. Graphite will simply oxidise by essentially mode 3 oxidation.

Why additives are used in lubricants?

The primary function of Lubricant additives is to improve the properties of the base stock under different operating conditions and the high performance requirements of any machinery. Lubricant additives are chemical components that need to blend well with the base oil to function as a single fluid.

What type of lubricant is graphite?

Graphite is a solid lubricant relating to the class of Inorganic lubricants with lamellar structure, which also includes molybdenum disulphide, boron nitride and some other sulphides, selenides and tellurides (chalcogenides) of molybdenum, tungsten, niobium, tantalum and titanium.

Which non metal is used as lubricant?

Graphite contains layers of carbon atoms. The layers slide over each other easily because there are only weak forces between them, making graphite slippery, soft and good lubricant .