He didn't live alone before, so is it because his roommates have moved away now because he can't stand his strange personality?

The two of them finished eating the plate of chicken in front of them in silence, "Wang Hong, do you need to pay here?" Lin Yu didn't know if he needed money in the chapter, his original mobile phone had been confiscated, and the current mobile phone was a satellite phone in charge of the communication signal system in the Beidou satellite system of Unicom, which only had a call function, no function to connect to the Internet.

And this satellite phone can't even be paged, it has to be applied for before it can be used, unless someone else calls him, it's just a brick.

However, this has the advantage of having an emergency call SOS, which can be used to call for help, which is also considered just in case.

He didn't have cash with him, and he couldn't pay electronically, and he would be embarrassed if he did.

"No, the food here is free, but there is a condition that it cannot be wasted, and those who cause waste will be fined according to the price of the dish, that is, the CD-ROM action is advocated here, and you can eat as much as you want."

"And this kind of rule, it's good." Lin Yu nodded.

"That's not it, on the afternoon of hoeing day, sweat drops of grass go down to the soil, who knows that the Chinese food on the plate is hard work." Wang Hong shook his head and recited a paragraph of "Compassion for Nong", "This is still thanks to Academician Yuan, we can have the qualification to waste, but our food is not easy to come by, but it must not be wasted." ”

"yes!"

The two of them were sighing at Academician Yuan's exploits in the cafeteria, and the door was pushed open again, and it was still the uncle from before, "Give, soup for the two." ”

"Soup? We didn't ask for soup. Lin Yu took the bowl with the soup with both hands and said with some doubts.

"Gifted, everyone has it." The uncle smiled and went out.

"I told you this soup is not bad, it's seaweed soup today?" Wang Hong glanced at the bowl that had just been placed on the table, "This is made by 'Aunt Tang' in our canteen, Aunt Tang's surname is soup, and she is also a good hand at making soup, and the taste is first-class!" ”

Lin Yu tasted it and exclaimed, "It's really good." ”

"Of course, the state treats those of us who are engaged in scientific research in terms of material conditions, and really strives to do the best in all aspects, so even the uncles and aunts who cook in the canteen are carefully selected, especially since we are a big foodie country in China."

"So we have to contribute our best to the country!" Wang Hong suddenly erupted with an angry feeling, which made Lin Yu feel that his mood had been sublimated.

Well, then it's decided, and it's time to do research here.

After quickly drinking the soup, Lin Yu pulled Wang Hong out and returned to the dormitory after saying hello to the canteen uncle.

"Are you coming tomorrow or today?" Lin Yu stood at the staircase on the sixth floor and asked Wang Hong.

"I'm ...... today," Wang Hong hesitated for a while, "Tomorrow, you might as well be mentally prepared." ”

"Okay." Lin Yu walked up to the seventh floor.

I didn't expect him to be self-aware, but why didn't he change it?

This is a point that Lin Yu can't figure out.

Forget it, whatever! Today, the Institute of Advanced Systems will try to engage in this gallium oxide coating.

According to Lin Yu's understanding of aerospace research and gallium oxide materials, this surface coating will definitely be used in rocket engines, because the engine unit bears the power of aerospace and is the heart of the rocket.

A rocket engine is a jet engine that does not use outside air as a combustion medium by a propellant (usually composed of oxidizer and fuel) with its own propellant.

It can work in the space outside the dense atmosphere, so that the energy is continuously converted into the kinetic energy of the working fluid in the rocket engine, forming a high-speed jet jet, so as to produce the thrust that makes the rocket rush out of the earth's gravitational constraints, in this sense, the rocket engine is also a major equipment related to national security and the national economy.

Gallium oxide coating belongs to the surface engineering of aerospace engines, and surface engineering technology is the foundation and guarantee that cannot be replaced by different high-performance aviation or rocket and missile engines.

Many people don't know that missiles also have engines, and the role of missile engines is the same as other engines, which are installed to help the warheads that cause lethality to strike at a long distance, such as the famous intercontinental missile, which is equipped with an engine group that can make the warhead advance across the continent to cause damage, so it is called an intercontinental missile.

Moreover, with the continuous improvement of the requirements for engine performance in the field of military and civil aviation (mainly aircraft), the working conditions of the new generation of aero engines are more harsh, and many key components are facing a series of harsh environments such as high temperature, overload, high speed, corrosion and impact.

There is a term in aerospace science and technology called "ablative materials", which is a surface material born in response to different environments, and ablative materials can be divided into three types according to the way of "ablation", that is, the sublimation type, melting type and carbonization type.

There are three common sublimation ablation materials, corresponding to three different types, PTFE, graphite, and carbon-carbon composites, and carbon-carbon composites are the most used in use. Carbon-carbon composite material is a material that uses carbon fiber fabric as a material to enhance the hardness and melting point of the material, and it is a material with extremely high strength that uses carbon as a matrix.

When the temperature of this composite material exceeds 3400°C in the process of strong friction with the atmosphere, the material will directly turn into gas and take away a lot of heat.

The use of this material as a protective layer for the head of the rocket can ensure that the rocket can safely pass through the atmosphere and enter space at high speed.

All in all, the person in charge of the aerospace project took a fancy to the properties of gallium oxide published by Lin Yu and was ready to study the possibility of this material as a matrix to make surface materials.

Gallium oxide has shown excellent resistance to high temperature and extremely low temperature in Lin Yu's experiments, and may be used as a new generation of materials in the aerospace field.

Even if it cannot be used as a coating for the surface of a rocket, it can be applied as a protective coating for a rocket engine.

Lin Yu, who had been tossing and turning in the system research institute all night, finally found out helplessly that the system research institute was unable to create an environment suitable for atmospheric friction and ultra-low temperature in space because of the lack of corresponding conditions.

"System, when will this analog device be online?" Lin Yu was a little unwilling, the highest temperature he could achieve in the laboratory was 3000 degrees Celsius, which was still a certain distance from the temperature generated by atmospheric friction, and the low temperature could meet the normal space temperature, compared to the temperature on the far side of the moon close to absolute zero, but it was still a little insufficient.

Think of the fact that the most luxurious research institutes in the country can produce nearly absolute zero degrees Celsius at more than minus 270 degrees Celsius.

Lin Yu instantly became envious.

"Wait until the host wins the Nobel Prize."

"Such a pit? It's not that you don't know how discriminatory they are against us Chinese people. ”

"Yes, so it's a big challenge for the host."