There are so many types of materials.

However, in terms of physical and chemical properties, it is roughly divided into metal materials, inorganic non-metallic materials, and polymer materials.

If it is divided in terms of use, it can be divided into electronic materials, aerospace materials, nuclear materials, building materials, energy materials, biological materials and so on.

With so many materials, Lu Yu's scalp was a little numb, and he didn't know where to start at all.

After all, Lu Yu's previous major was not materials science.

I didn't know about the current situation of the basic materials industry before.

Now I know that although China's manufacturing industry has ranked first in the world for many years since 2010, and many fields such as manned spaceflight and high-speed rail have made major breakthroughs and are in the lead.

However, on the whole, 32% of key materials are still blank in China, and 52% are dependent on imports.

The vast majority of computer and server general-purpose processors, 95% of high-end special chips, more than 70% of intelligent terminal processors, and the vast majority of memory chips rely on imports.

In the field of equipment manufacturing, more than 95% of the manufacturing and testing equipment of high-end CNC machine tools, high-end equipment and instruments, launch vehicles, large aircraft, aero engines, automobiles and other key components finishing production lines rely on imports.

……

All of these are caused by the backwardness of basic materials research and industrial production system.

For example, the "microcrystalline screen bone" microsphere has advanced manufacturing technology in China, but the impurity of domestic raw materials affects the performance of microspheres, so it can only be imported.

For example, the ITO target used in the manufacture of liquid crystal displays is of unstable domestic quality, and the materials are not up to standard, so they can only be imported.

Another example is the aviation steel used in domestic large aircraft, or the material problem, the purity of super-strength steel is not enough, and it must be imported from lighthouse countries.

However, it is not only a matter of material, but also of processing technology.

For example, the core of high-end machine tool manufacturing, such as CNC system, in addition to the controller, the main functional components of domestic machine tools, such as lead screws, guide rails, servo motors, torque motors, electric spindles, encoders, etc., rely on foreign products.

These are gaps in basic materials, processing and design.

……

We all know the lithography machines used to make chips, and ASML in the Netherlands has always been in a monopoly position.

However, the lithography machine is not produced by ASML itself, it is a collection of the world's top technologies, and is known as the "crown jewel of human industry".

This is a product that integrates top technologies in the fields of mathematics, optics, fluid mechanics, polymer physics and chemistry, surface physics and chemistry, precision instruments, machinery, automation, software and so on.

The lithography machine requires a top-notch light source and extreme mechanical precision, for which more than 100,000 parts are needed, and a car is about 5,000.

The lenses are the result of ZEISS technology, the ancestral grinding technology of Germania, and the accumulation of centuries of polishing lenses.

Neon Nation provides special composite materials, Swedish industrial precision machine tool technology, Lighthouse Nation provides control software and power supply, and much more.

It can be said that no country in the world can rely on itself to manufacture the most advanced lithography machine.

……

Looking at this information, Lu Yu frowned, and found that this was a little different from what he expected.

His original plan was to establish a research institute, then research basic materials, and then license the production to domestic manufacturers after obtaining the results, and collect patent fees by himself.

It's good to think about it, but now it seems that it is very likely that some new materials have been developed by themselves and licensed to domestic manufacturers, and they have also produced them, but high-end precision machining can only be done by foreign manufacturers.

Coming and going, isn't this a way for foreign manufacturers to buy domestic basic materials, and then sell them back to China at a high price after precision processing, so that foreigners can pick wool in disguise?

And when you need high-precision parts in the future, you will have to be picked up once?

And that's not all, it's critical that the establishment of a research institute requires a lot of money.

The research and development of these basic materials also requires huge capital investment.

However, most of the basic materials are only licensed through patents, and it is likely that they will not even recover the cost of research.

Even if you have your own guidance and vague ideas, it can't be too obvious, right?

What should be invested is still invested.

If you invest so much but can't earn it back, isn't that another way of burning yourself, releasing light and heat?

Lu Yu said that he was not that great.

And domestic things, ahem, sometimes it doesn't mean that you have to use your materials if your materials are advanced.

If you don't have certain social resources and connections, who will pay attention to you?

If you take advanced material technology and rush to ask for authorization, others may not necessarily take care of you, and you can understand the human society.

The basic materials have been solved, and now there are processing technology problems and practical problems of promotion.

Lu Yu scratched his head a little distressed.

……

But soon put these troubles aside for the time being.

These are his views as a layman in materials science and checking the information on his own.

To really understand, it is necessary to learn the knowledge of materials science.

No matter what the problem is, in the end, it can only be solved by learning first.

Lu Yu sorted out his mood and set off to the Shudu Library to start another stage of his learning journey.

I took the subway to the library, found the materials science area, took the basic basic books, and immersed myself in the books.

……

Left the library at five o'clock and borrowed a few more books.

On the subway, Lu Yu was a little hesitant, but finally chose to go to his home at Shuyin University.

He really can't be blamed for this, he just wants to read a book quietly and seriously for a few days and learn the knowledge of material science.

I really didn't dare to go back to Shi Zixuan and Qin Xiaomian.

It is not to blame that the comrades are not firm in their thinking, but that the enemy army is too cunning and too powerful at provoking people.

Comrade Lu Yu has to guard against it!

History has long had many lessons, and it is necessary to indulge in women.

Such as who and who, and who and who, because of their addiction to women, don't they all end up dripping?

Right?

So for those students who are obsessed with watching the young lady's dancing video, or an educational film about the origin of life, the coach has some heartfelt words here:

You can learn anything!

Addicted to women, you must not learn!

Just ask the coach to put them away for you and review them critically.

You are still young, don't get too caught up in it.

……

Lu Yu carried the book back to his home at Shuyin University.

Zhang Kexin and Qianqian should be in school and are not practicing.

I heard Chen Xiaofei say that the two of them applied for a professional training camp for musical instrument masters during the summer vacation, and I don't know if it is useful or not.

I put my backpack with books in my room and went downstairs to eat at a random restaurant in the snack street below.

After eating, I wandered around the street again, bought a lot of fruit, and prepared to go home and put it in the refrigerator.

When I got home, I left a light on in the living room, so I went back to my room and sat at the small desk and read the book carefully.

At seven o'clock in the evening, Zhang Kexin and Qianqian came from school to practice, and when they entered the door, they found that the living room was lit up.

The lights in Lu Yu's room were also on, guessing that Lu Yu might be back, so the two walked to Lu Yu's room and knocked on the door.

Zhang Kexin: "The surname is Lu, are you here?" ”

Lu Yu opened the door with the book and looked at the two: "Who else could it be if it wasn't me?" ”

Zhang Kexin pouted: "How do I know if it's you?" Besides, we two delicate and frail girls, someone suddenly came to the house, of course we have to be careful. ”

Lu Yu: "What you said is very reasonable, I am speechless." ”

Zhang Kexin: "Eh, what have you been doing lately, I haven't seen you for a long time." ”

Lu Yu: "Play with two young ladies." ”

Zhang Kexin cut off, pulled shallow and walked to the piano room:

"I'm too lazy to pay attention to you, let's play by myself."

Lu Yu also closed the door, went back to continue reading, and vaguely heard the sound of Zhang Kexin and Qianqian practicing the piano, and left at about ten o'clock.

Lu Yu didn't go to bed until after twelve o'clock at night.

I got up at a little after eight o'clock in the morning, washed up, went downstairs for breakfast, and rushed to the library.

Returning books, reading books, borrowing books, a few days pass so quickly.

……

The day before, Lu Yu borrowed a lot of books and went home, planning to read at home today instead of going to the library.

It's the same posture every day, and Lu Yu plans to change it today.

When they returned home and were preparing to study, Zhang Kexin and Qianqian came out of the small attic and should be ready to go to class.

Zhang Kexin saw Lu Yu: "Hey, surnamed Lu, aren't you going out today?" ”

Lu Yu didn't even look at her, and returned: "Well, I'm reading at home today." ”

Zhang Kexin: "Then wait for us to eat at noon, please." ”

After speaking, he pulled shallow and went out of the door.

Lu Yu was in the room all morning, and he didn't pay attention to the time, until Zhang Kexin and Qianqian knocked on his door before they knew that it was noon.

Zhang Kexin: "The surname is Lu, it's time to invite us to dinner." ”

Lu Yu opened the door and leaned against the door frame, staring at her curiously:

"It stands to reason that you are practicing in my piano room, why should you invite me?"

Zhang Kexin's eyes widened: "What do you want?" How many people want to invite us to go, but we don't go. ”

"Also, invited our two beautiful and charming young ladies to dinner, have you been wronged?"

Shallow has been watching the two bickering on the side, chuckling.

Lu Yu opened his mouth, didn't hold back a word for a long time, simply didn't reply, took out the phone and called Chen Xiaofei, and turned on the speakerphone.

……

The phone was connected, and Chen Xiaofei's voice came: "What's the matter, surnamed Lu?" ”

Lu Yu looked at Zhang Kexin: "Your family Zhang Kexin slandered me." ”

Zhang Kexin's eyes widened, and Chen Xiaofei smiled:

"Hehe, this is a new thing, tell me, why did she slander you?"

Lu Yu: "It's okay to use my piano room without saying thank you, and you want me to invite you to dinner, that's all, it's still for the sake of the mask." ”

Chen Xiaofei smiled happily, and suddenly remembered something and said:

"Haha, oh, oh, by the way, I almost forgot if you didn't say it."

"My mother has run out of masks from you last time, and you know that my mother's business is not only my mother's business, but also my aunt's and aunt's cousins' affairs, and you can't grab the mask now, you can get me some in the afternoon."

Lu Yu's eyelids rolled: "Tsk, Zhang Kexin and you are really a good match!" Moving by car, I don't have this service delivered to my door. ”

Chen Xiaofei: "Solid!" Splash! ”

"Wait, half an hour, I'll invite you to a big meal, choose whatever you want, if it's cheap, you won't give me Chen Xiaofei's face."

After finishing speaking, he hung up the phone, Lu Yu also put the phone away, and said to Zhang Kexin:

"Hear that? Feel free to choose any point, don't be polite to me, otherwise you won't give me Lu Yu's face. ”

Zhang Kexin squinted, gritted her teeth, took a few deep breaths, and felt a little sore.

……

Shallow pulled Zhang Kexin, who wanted to slap Lu Yu, back to the living room.

Lu Yu also went back to the room to put the book, came to the living room, took a sand pear in the refrigerator, and after washing it, found a recliner opposite Zhang Kexin, and ate it comfortably.

Not for anything else, just to get in the way of her eyes.

Zhang Kexin's milk hurt even more, and she was furious: "The surname is Lu, don't go too far!" ”

Lu Yu looked at her blankly: "What's wrong with me?" Why am I going too far? ”

Zhang Kexin had nothing to say, and didn't hold back a word for a long time.

……