Contents
Diamond
When it comes to hardness, the diamond is the undisputed king. This tough material is made up of pure carbon, and its strength comes from the strong chemical bonds between the atoms. A diamond is so hard that another diamond can only scratch it. Unfortunately, however, this incredible hardness also makes the diamond brittle, and it can shatter if hit with a blow from a hammer.
Diamond is still the hardest known naturally occurring substance on Earth despite its flaws. Artificial materials, such as cubic boron nitride and boron carbide, have been created even harder than diamond. However, these materials are not found in nature and are only used in specialized applications.
Aerogel
Aerogel is often cited as the world’s lightest solid, but that’s not entirely accurate. It’s a low-density network of interconnected pores, with each pore filled with air. Despite its fragile appearance, aerogel is incredibly strong. It can support up to 4,000 times its weight and has a compressive strength of 10,000 psi. Aerogel has been used as an impact-absorbing material in bulletproof vests to spacecraft.
So how does this solid and lightweight material made? The process begins with a silicon-based compound combined with a solvent to form a gel. The gel is then supercritically dried, removing the solvent at a pressure and temperature above its critical point. This leaves behind a network of air-filled pores, resulting in up to 99% air material.
Silicon Carbide
Out of all the substances on Earth, silicon carbide is widely considered one of the hardest. It is frequently used as an abrasive material and is known for its durability and strength. Silicon carbide is also resistant to high temperatures, making it an ideal material for many industrial applications. In addition, silicon carbide is so strong that it is often used in bulletproof vests and other protective gear.
While silicon carbide is one of the most complex substances on Earth, it is not indestructible. With enough force, it can be shattered or crushed. However, its strength and resilience make it a material that can withstand wear and tear.
Darwin’s Bark Spider
According to recent studies, the hardest substance on Earth is the exoskeleton of Darwin’s bark spider. Found in Madagascar, this spider can spin webs up to 25 meters in length. In addition, the silk that the spider produces is solid, and it has a tensile strength that is greater than that of Kevlar.
In addition, the silk is also resistant to breaking and stretching, making it one of the most durable materials known to man. While Darwin’s bark spider is not the only creature that produces tough silk, it is the most efficient at doing so. As a result, its exoskeleton is significantly more complex than anything else found on Earth.
The Earth Is Full Of Complex Substances!
In conclusion, there are a variety of complex substances on Earth, each with its unique properties. For example, while the diamond is the hardest naturally occurring substance, artificial materials, such as cubic boron nitride and boron carbide, are even more difficult. However, these materials are not found in nature and are only used in specialized applications.
The web of Darwin’s bark spider is one of the hardest known substances due to the spider’s ability to produce silk that is stronger than Kevlar. While all of these substances are incredibly hard, they are not indestructible. With enough force, they can be shattered or crushed. Nonetheless, they are all solid and resilient, making them some of the most complex substances on Earth.