In February 1940, Howard Stark presented vibranium in Los Angeles, a metal Stark Industries researchers discovered in Africa.
Eventually Tony Stark, while looking for a replacement for Palladium (which was poisoning his heart), stumbled upon his father's blueprints for Vibranium and used it as a viable replacement to power both his heart and the Iron Man Mark VI suit.
He recreated the element by using a Particle Accelerator in his basement and created a brand new Arc Reactor to utilize the new core and a new suit that could better utilize the higher energy output, as well as cure him of the palladium poisoning in his blood.
Vibranium is a rare metal said to have gotten on planet by way of a meteorite landing on earth 10,000 years ago. It was first discovered in Antarctica and is tagged “Anti-Metal”. There are different types of Vibranium which have similar but also slightly different properties.
No, Iron Man has never made a suit out of vibranium.
The first appearance of Vibranium in the MCU was in Captain America: The First Avenger. Howard Stark had used a small amount of it to make what would become Captain America's shield, one of the most formidable weapons on Earth. What was interesting was that Howard believed this to be all of the Vibranium on the planet.
Adamantium is a metallic alloy that, once the elements are brought together, cannot be broken. That makes adamantium really powerful in the Marvel world, used for the outer shell of the robot Ultron, but mainly for its use in the claws and skeletons of Wolverine and his various enemies and allies.
Bruce Banner discovered that during a previous Chitauri attack, the Hulk had been able to smash through the Vibranium plated Chitauri ships without any effort. Because of this, he discovered that Vibranium turns brittle when exposed to gamma radiation.
Unlike adamantum, Magneto cannot manipulate vibranium – not if it's pure. Vibranium is a rare, extraterrestrial metallic ore. It has near-mystical properties that allow for energy manipulation and more. There is a Wakandan isotope and an Antarctic isotope, and both of them are completely unaffected by Magneto's powers.
James Kakalios, a physics, and astronomy professor at the University of Minnesota suggests a substance known as graphene would be the closest substance to vibranium known to man.
In the Iron Man 2 novelization, the new element created by Tony Stark to replace Palladium in the arc reactor is called Vibranium. This information would later be invalidated by Captain America: The First Avenger, where Vibranium is shown as a rare metal already existing in the 1940s.
The composition consists of Smart Gold-Titanium Nano-Particles, giving the armor greater adaptability, durability, power and flexibility combination.
Ultron knew Strucker would be able to tell him where to obtain the Vibranium he needed. Once he had broken into Strucker's cell, Strucker revealed that it was possible to get the vibranium from Ulysses Klaue.
Tony did have an existing personal relationship with the leader of the advanced nation and he could've asked for a personal favor and bought some of it for himself. However, he didn't, and for a good reason. Since Vibranium is extremely rare and valuable, it also doesn't come cheap.
In Seoul, South Korea, Ultron attacked Helen Cho, a friend of the Avengers, at her lab at U-Gin. He used the scepter to make her make him the perfect body, one made of synthetic vibranium, that would be his ultimate and final form.
Even the most powerful substances have their weaknesses, and Vibranium is no exception. The Wakandan metal, although near indestructible, is shown to be able to melt under the heat produced by the Mind Stone, when coupled with a single lightning bolt, courtesy of Thor's (Chris Hemsworth) Mjølnir.
While vibranium is the more durable material, adamantium is the more dense material. This means that given the right circumstances, adamantium can potentially cut through pure vibranium.
The Adamantium-Vibranium Armor is a very durable full-body armor made of the combined adamantium and vibranium metals. Similar to Captain America's Shield.
“It's well documented that the hammer is made out of 'Uru,' a fictional metal from Thor's native realm of Asgard.”
Vibranium is the strongest metle on earth. Adamantium is strong but not as vibranium so caps shield cannot be tear apart by logans claws.
Only beings with godlike powers (such as Rune King Thor) or with strong magnetic powers (like Magneto) can manipulate Primary Adamantium. Otherwise, it is completely indestructible to all forms of attack.
Thanos sword is very likely made of Uru, one of the strongest metals in the Universe. The same substance that was used by Eitri to make Thor's weapons on Nidavellir – Mjolnir and Stormbreaker. Uru is a metal ore found only on the first moon that came into existence. It is incredibly durable.
The hammer Stormbreaker is very similar to Mjolnir, made of mystic Uru metal and is nearly indestructible.
As mentioned above, tungsten is the strongest of any natural metal (142,000 psi).