God-level Xueba system

Yanshi No. [-] Middle School.

library.

"Zhang Ze, do you know where Yan Xin has been recently?"

Lin Hui hasn't seen Yan Xin in the past few days, thinking that this guy is on vacation and won't come to school.

"I don't know! Who knows where this guy has gone! Maybe he's playing games at home!" Zhang Ze snorted disdainfully.

Lin Hui was always absent-minded when he came to the library recently, and blushed at every turn. Zhang Ze thought that his stalking had had an effect, and these days he often studied by Lin Hui's side.

How did he know that Lin Hui only thought of the scene on the bus that day.

Lin Hui herself was also puzzled.

In the past few days, I always thought of Yan Xin for no reason, thinking of Yan Xin making a move for her that day, thinking of him holding her hand when getting out of the car, all of this made Lin Hui unforgettable!
There are three more days until the competition begins!

I can't think about these useless things!

Lin Hui shook her head vigorously, it was really a headache!
"Lin Hui, do you want to have dinner together after school?"

Zhang Ze felt that Lin Hui was always inexplicably shy these days, maybe he felt that his time had come, and he should take advantage of the victory to pursue it now!
"No! I have to study hard these few days, you can do it yourself!" Lin Hui walked out of the self-study room with the book in his hands after speaking, and went to recite English vocabulary.

Yan Xin naturally doesn't have time to fool around these days.

Instead, I went to find a place to study.

After learning about the majors of the university that night and determining the direction of her research, Yan Xin decided not to waste time in the library at night.

Instead of endlessly brushing the brain-damaged questions in high school, it is better to read more professional course books in universities.

But where to borrow books has become a big problem!
Yan Xin looked at the pitiful few points on the system panel, and was really reluctant to buy them in the encyclopedia of the system store!

Then you can only go to the municipal library!

The municipal library is not very far from home. Apart from attending classes during the day, Yan Xin spends most of her evenings in the municipal library these days.

There are quite a lot of books on advanced mathematics and materials majors here. After searching for a long time, Yan Xin finally found a book for introductory materials: Fundamentals of Materials Science.

There are basically no people in the library of materials majors. After all, most of the people who come to the library to read are students.

The most popular among students is naturally the novel and comic book library area.

That's good, at least no one will disturb Yan Xin's reading.

Finding a spacious place at random, Yan Xin opened the book Fundamentals of Materials Science.

Yan Xin took a brief look. This book mainly explains materials from the microscopic perspective, starting with the structure of atoms, and then going to the knowledge of crystallography and crystal defects.

The main difficulty of this book lies in the analysis of phase diagrams, especially the analysis of ternary phase diagrams, which Yan Xin could not understand at all.

However, the previous basic knowledge is quite attractive to Yan Xin. After all, these belong to the basic knowledge of chemistry in high school, and it is not difficult to understand.

Yan Xin was fascinated, but she didn't notice an old man standing behind her.

This old man has white hair and a pair of gold-rimmed glasses. Although his face is wrinkled, his eyes are piercing and his temperament is refined. He doesn't look like a mortal at first glance.

The old man couldn't bear to interrupt Yan Xin, so he stood behind Yan Xin from the beginning to the end.

"Haha~ I'm so tired!" Yan Xin couldn't help stretching after reading the chapter on crystal defects, and turned around to touch the old man's arm with both hands.

"Ah! I'm sorry! I'm sorry!" Yan Xin instinctively apologized when she realized that she had bumped into someone.

"Hehe! It's okay! I see that my little friend has been reading the basics of material science, and seems to be very interested in materials?"

"Yes, it is!"

"But I think you are a sophomore in high school, right? Can you understand these books?" The old man was somewhat puzzled.

Today's children either like comics or novels, and the following section is full of people every day.

On the other hand, the materials, environment, machinery and other special areas on the upper floors of the municipal library are a bit bleak, and there are basically no people.

This is also why the old man is curious about this boy.

"Yeah, grandpa is right! I'm a third year student!" Yan Xin grinned.

"Ah? It's more than a month before the college entrance examination. Why don't you study at school, but come here to read these books that have nothing to do with you?" This time it was the old man's turn to be puzzled.

"I have read the knowledge points of the college entrance examination several times. There is really nothing to do! It is a waste of time to review!" Yan Xin shook his head.

This is the truth.

But this sentence came out of a 17-year-old boy's mouth, which surprised the old man somewhat.

Yan Xin saw the questioning eyes of the old man, so he took out 5.3 and review questions of each subject from the schoolbag behind him.

The old man took it over and looked at it, his pupils dilated immediately!

This kid is stronger than when he was young!
This exercise book is full of dense formulas, and many questions have been repeated many times.

But what puzzled the old man was that if you read it many times, these exercise books should be very old. Why are these books not damaged, but very new?

This is natural!

It took Yan Xin only less than a month to read these exercise books three times!

Compared with those who need a long time to finish it, Yan Xin's book is naturally new.

The old man suddenly changed his eyes on the young man in front of him!
The kid really shocked him!

Looking at the basics of material science, the old man couldn't help smiling.

Since this young man likes materials so much, let me be a favor and recommend some books to him!
"Little friend, this book is not very helpful to you! If you believe me, I will take you to find some other books to try and read?" The old man smiled kindly.

Yan Xin glanced at the old man dully, then nodded mechanically.

The old man took Yan Xin to the materials department at the back, and after searching, he handed Yan Xin a few books.

Material characterization methods;

The basis of material strengthening and toughening;

Comprehensive performance research of aerospace materials;

Composition design and application of high entropy alloys.

In the previous few books, Yan Xin still understood a little bit from the literal meaning, but looking at this high-entropy alloy, Yan Xin could not help frowning.

What the hell is a high-entropy alloy?
"Grandpa, what is this high-entropy alloy?"

The old man smiled: "The so-called high-entropy alloy is currently a research hotspot among metal material experts in the world. To put it bluntly, it is a metal made of five or more elements in different proportions, and it is called a high-entropy alloy. !"

Yan Xin nodded half understanding.

"Is it like a cocktail?"

After listening to Yan Xin's answer, the old man couldn't help but nodded in shock: "That's right! High-entropy alloys have four major effects: high-entropy effect, lattice distortion, cocktail effect and diffusion effect!"

"Oh! So I just need to add metals to make a new type of high-entropy alloy?" Yan Xin asked.

"Of course not! If you want to make a high-entropy alloy with good comprehensive performance, you need to fully consider the advantages of each metal element! For example, chemically active metals are not resistant to corrosion, such as sodium and iron; and titanium is Very corrosion resistant. If you add friction-resistant aluminum and yttrium, you can make high-entropy alloys that are excellent!"

Yan Xin was completely dumbfounded!
"And the cocktail effect you mentioned may be unintentional, but high-entropy alloys do have such an advantage! It is that mixing multiple elements will have unexpected effects!" The old man explained with a smile.

"I understand! A cocktail is a mixture of several very mellow wines, which will create a new taste! And the same is true for high-entropy alloys?"

"Not bad!" The old man nodded in satisfaction.