Chapter 92 Gao Zhendong is a spy!!
Lin Lianwei started again the air-to-air conversation that had taken place between him and Gao Zhendong several times, but this time, he was much more skillful.

And today, I just want to broaden my thinking. There are some ideas in the hospital. I come to Gao Zhendong to gather ideas, not to solve urgent problems.

"It's still a question of heat resistance. It has to be about 1800~2000 degrees. It's a one-time use and the working time is not long. It can be attached to the metal substrate, and the substrate itself can withstand a temperature of about 1000 degrees. But there is a problem, it works in a high-temperature, high-pressure and high-speed gas atmosphere."

Look, Lin Lianwei did it in one go, he is so skilled.

Lin Lianwei and his superior, Engineer Lu and chief model designer, all estimated that Gao Zhendong had guessed what they were doing, but even though they had guessed, they still couldn't say it out loud.

In turn, Gao Zhendong also knew that they knew that he already knew it, but Gao Zhendong could not say it out loud.

But at least this estimate can allow Lin Lianwei and his colleagues at the design institute to describe the problem as clearly as possible within the scope permitted by the rules.

There was no need to play the guessing game this time; the missile’s rocket engine’s tail nozzle was clearly visible.

However, I don’t know how long their working time is. But considering that they should be infrared combat bullets, it will not be long, basically calculated in seconds.

After considering the possible technologies available, Gao Zhendong gave the answer immediately: "Molybdenum, tungsten, tungsten-silver alloy, tungsten-copper alloy, metal ceramics or graphite."

As for carbon-carbon composite materials, there is no need to talk about them at this time.

The things mentioned above were barely within Lin Lianwei's knowledge, but the graphite thing made him a little confused.

"Graphite? Isn't that carbon? It works in high-temperature, high-pressure, high-speed gases."

"That's right. What's wrong with carbon? Isn't diamond also carbon? Why is it so hard? Before graphite burns out, it has good heat resistance. Isn't this a one-time thing? Just make it thick enough."

After thinking for a while, Gao Zhendong added: "Polycrystalline graphite will do. It's cheap and can be infiltrated with silicon or copper. But even better is pyrolytic graphite, which can be made using vapor deposition."

There was no such thing as pyrolytic graphite in China at that time. Research on it only began in the early 60s. It was not until the 70s that it was actually used in missiles and rockets.

But this does not affect Gao Zhendong's speaking out so openly. In the field of materials, he can say more given his current situation.

These things were completely beyond Lin Lianwei's knowledge, and he just wrote them down stupidly.

Gao Zhendong thought for a moment and added, "If the working hours are long, the design will be more complicated."

This sentence is very clever. It's just a step away from saying "If the rocket engine nozzle is to work for a long time, it will be more complicated." In fact, at this point, both parties know that the other party knows it, but still can't say it, which is very funny.

The reason why Gao Zhendong knew this thing was that as a senior military fan, he had bought some military professional books in his previous life when he was in the second period of his life in order to communicate with people online.

But later on, he almost couldn't get ashore while swimming in the ocean of automation, and those immature practices and ideas gradually faded away and disappeared from the books.

Among them, there is a publicly published book about rocket engine design. Isn’t it amazing that in Gao Zhendong’s previous life, these books that only involved outdated and basic theories and technologies had already been publicly published.

But what was outdated then is not outdated now.

Gao Zhendong read the book carefully. With his current brain, he has a very good memory, but he needs to recall it before he can remember it.

If no one reminds or guides him, he won't be able to remember it. It's a bit too much.

Lin Lianwei wrote down Gao Zhendong's every word and returned to the company with a lot of lawsuits on his mind. Although he didn't understand it, he still felt that he had gained a lot. Back at the design institute, Lin Lianwei took out his gains and communicated with the person in charge of the engine and the chief designer of the model.

When the two of them saw it, they thought, hey, Gao Zhendong has a lot of ideas, worthy of being someone who deals with materials.

“Molybdenum and tungsten are not suitable because they are heavy and expensive.”

“We haven’t considered tungsten silver or tungsten copper alloys, but it is indeed a way, but the price is also expensive.”

"It should be a way to use tungsten as the skeleton and silver or copper as the sweating material to further take away the heat."

"Metal ceramics can be considered, but firing and adhesion are also problems."

"Polycrystalline graphite? Silicon or copper infiltration? This seems to be feasible and the price should be cheap. We have considered it before, but it is not so clear."

"Yes, yes, yes, it's a one-time thing, just forget about it after it's burned out. As long as the ablation rate is stable, the pressure change caused by ablation can be controlled."

"I have classmates at the Northeast Carbon Research Institute. I can ask them if they have any suitable materials."

"Can you tell me what pyrolytic graphite is? I've never heard of it. Is it vapor deposition method?"

"I'll ask my classmates, maybe they know."

The two of them looked at the last line of words on Lin Lianwei's notebook in a daze. They looked at each other, and the chief designer asked Lin Lianwei: "What does he mean by this? Did you tell him what this is?"

Lin Lianwei shook his head: "No, he probably has more ideas about long-term continuous working conditions."

The chief engineer smiled and said, "Maybe he guessed it, but it's hard to say. After all, it's no secret that you work in our Institute of Research. Every time you go to see him, the questions you ask are very clear. With his ability, it's not surprising that he guessed it."

Lin Lianwei nodded: "Yes, that should be it. This time he didn't even wait for me to say it a second time before he started answering my question."

The chief designer cheerfully reminded Lin Lianwei: "It seems that he has quite a few ideas about rocket engines. He is the kind that can solve problems and combine theory with practice. If you have any questions, go look for him more often."

After thinking for a while, he added, "By the way, next time you go there, remember his full name, department, position, and title. I will add him to the list of key researchers for the model. He has taken so much advantage of me, so I should give him some credit."

Lin Lianwei nodded repeatedly.

The Institute of Guidance and Research was happy that the model development had made another step forward, and after Gao Zhendong had dinner with his colleagues in the research group and returned home, he went straight into the south room, took out his transistor computer, and continued debugging his minimalist IDE consisting of asm, vi, and math.

Just when Gao Zhendong was working hard, a man came from the Internal Security Section of the Security Department of the Third Steel Rolling Mill.

The man was leaning on a crutch, limping towards the internal security department's duty room. The light in the room illuminated his fat face in the darkness.

——Liu Haizhong.

Walking into the duty room, he was a little out of breath, took out his handkerchief, wiped the sweat off his face, and said loudly to the internal security officer on duty:

"Comrade, I report Gao Zhendong. He is a spy!!"

(End of this chapter)