Deep Space Fleet

"Yes, it is really troublesome." The expert in mechanics discussed: "Many advances in science and technology are essentially advances in materials science."

"If there is no rare earth, it will be difficult to make advances in materials science, and naturally no powerful engine will be made. Even some composite ceramics also need rare earth."

How important is rhenium?

In materials science, it is as important as petroleum!

Take the engine as an example: In the era of turbojet engines, the gap between the turbine blades and the casing was wide, the temperature in front of the turbine was low, and the amount of deformation of the turbine blades during operation was within a controllable range. Conventional materials can still be used. .

In the era of turbofan engines, the temperature of the front of the high-pressure turbine is higher, and the tip clearance is smaller. The problem of turbine blade deformation is particularly prominent. The main element to solve this problem is the element rhenium. Adding rhenium to the nickel alloy can significantly increase the creep strength of the alloy, and it can also resist deformation well under long-term work.

If this element is lacking, then the Taipu people will not be able to develop into turbojet engines. Even if they are clever, the clever women will not be able to cook without rice.

Most of the rare earths that can be used on cell phones are light rare earths, and the reserves are sloppy, but heavy rare earths like thorium are rare.

"The amount of mineable 铼 resources on the earth is only 2,500 tons. This planet may be less, maybe only ... 100 tons? Such a big planet is not useful at all."

Zhang Yuan could n’t help asking: “Our current material technology has widely used composite ceramics and nano-materials, right? Many materials do n’t have plutonium, so are they likely to skip technology?”

"It is impossible, there are many materials that still need to use rare earth elements. It is because we have developed for hundreds of years ... No, for thousands of years. Lord Captain, we are already a third-level civilization." The scientist said: " Rice has to be eaten bite by bite, and the road must be taken step by step. Without the previous results, it is impossible to have the funds to study the subsequent results. "

"If even ordinary propeller planes and jet engines cannot be researched, how can it be possible to step up to the sky and develop our ram engines?"

This is also one of the important reasons why the Taipu civilization has not developed an aerial vehicle so far. Not only because the money is not in place, the lack of materials is also a major reason.

Of course, the Taipu civilization also faces a fourth difficulty, which is that the atmosphere is too thick and the rocket launch is difficult.

的 The friction coefficient of the atmosphere is proportional to the air density. Rockets flying at high speed will be subject to greater resistance. At the same time, the high temperature of the rocket surface also puts forward more requirements for materials science.

"If this civilization wants to launch a rocket, it must have higher-performance materials. But this difficulty is the simplest point, and it can be overcome with barely a hand."

以上 "These are the objective circumstances currently facing the Taipu people, all of which are difficult."

Upon hearing this, Zhang Yuan frowned. "Compared with humans, the Taipu people are really a very unlucky civilization ... So, if I am the leader of the Taipu civilization, with the help of human hands, I will launch some satellites. Indeed, It's a good deal. "

Li Zhendong replied: "As for the next few decades, this batch of satellites will be scrapped. It doesn't really matter if there is a next batch of satellites. Anyway, I'm no longer in office, and I will retire with a high probability. People will only Read me well. "

"You are very politically aware."

Then, suppose that the civilization of the Enlightened had really come to this planet before 150,000 years ago. After inspecting the entire planet, they should also be able to foresee these difficult points. How can they help them? In particular, this help may occur hundreds of thousands of years later.

This problem is very complicated. The Enlightened civilization has always disliked direct gifts.

"If it is a human being, it is really difficult to help without directly donating technology. In particular, the other party was a group of primitive people 150,000 years ago ... high gravity, high atmospheric pressure, lack of rare earth elements, how to solve it? And primitive People say things like rare earths and they don't understand. "

The expert said excitedly: "... So we follow archeological thinking and study what happened 150,000 years ago, whether it is a natural disaster or not. If this matter has enough influence, It must be possible to find some clues in history. "

"Sure enough!"

"Fifteen thousand years ago, a super earthquake broke out from the ocean!"

"Conservatively estimates that the magnitude reached at least magnitude 13."

13 magnitude earthquake!

The magnitude of each of the tremors is 1.0 magnitude, and the energy difference is about 32 times. In other words, a magnitude 6 earthquake is equivalent to 32 magnitude 5 earthquakes, and a magnitude 7 earthquake is equivalent to 1,000 magnitude 5 earthquakes.

So, a magnitude 13 earthquake is equivalent to a magnitude earthquake!

Such a super earthquake can already cause the displacement of the crustal plate.

At that moment, a huge tsunami was born!

A large number of volcanoes erupted at the same time, and the overwhelming dust blocked the global sun. Immediately after, the drastic drop in temperature brought global heavy rainfall, and a small ice age caused by the earthquake was born.

小 The duration of this Little Ice Age is not too long. It lasted for more than 2 years. A large amount of precipitation caused the dust in the sky to fall again, showing bright sunshine.

Within two years, the species will not be extinct.

However, so far, the Taipu people have not investigated the specific cause of this earthquake, and can only attribute its ambiguity to the crustal plate movement.

Zhang Yuan could not help asking: "So, is this earthquake related to the civilization of the Enlightened? Can it be said that rare earth elements have appeared in large numbers during volcanic eruptions and earthquakes? It is quite possible ... but this method is too crude ... is it exploding? "

This is the intuitive idea of ​​many people ~ www.readwn.com ~ so that everyone will be surprised at a little speechless.

The scientists on the stage couldn't help but smile a bitterly, and then said, "We first inspected the place where the earthquake occurred. There is already a deep-sea area, and the deepest trench can reach 30,000 meters. I think even the deep-sea area contains huge mineral resources. There is no way to develop the Taipu civilization. "

"Thirty thousand seawater, even we can't develop it."

The ocean is indeed a huge treasure trove. The deep-sea bottom manganese nodules are well-known deep-sea minerals. They contain more than 20 elements such as manganese, iron, nickel, and cobalt, and have great economic value. However, even if there is no earthquake, these sources will naturally occur.

大多数 Most of the seabed mineral mining bases are established in shallow waters. Human deepwater drilling generally refers to offshore operations with a water depth of more than 900 meters, and extreme water depths refer to water depths greater than 1500 meters.

The deeper the water, the greater the difficulty. In the deep water area of ​​30,000 meters, even human submarines seem to be struggling, not to mention the large-scale development.

"I can't confirm for the time being whether the earthquake has an impact on the global amount of seabed minerals. According to computer simulations, there is a certain probability after a major earthquake, because of the volcanic eruptions of the seabed, there are more seabed mineral resources worldwide ... specific figures , We have no way to measure. "

"However, this earthquake also brought a series of subsequent chain reactions ..."