Chapter 59： deadly bait

Seeing Professor Chen Guodong's annoyed appearance, Li Yi couldn't help laughing, and looked at Xu Xiuyong to observe his expression.

The reason why Li Yi asked him that was because he was going to throw another bait.

In front of everyone, he threw a bait that Xu Xiuyong could see but couldn't eat.

The overall strength of Jinyuan Technology is not bad. Li Yi has taken a fancy to it and plans to take this cooperation opportunity to take this company into his pocket. However, a commission for material development alone is not enough for Jinyuan to fall into his arms.

Before coming to Jinyuan Technology, Li Yi rummaged through the library for a large number of Borsai civilization industrial manufacturing technologies, especially 3D printing-related production technologies.

The technology with too high technological content lacks the conditions to reproduce it. Li Yi is looking for those black technologies that are in the same period as the level of human technology, or are one or two generations ahead.

When the Boersai people were in the planetary age, they had a history of scientific and technological advancement for hundreds of years, and finally entered the interstellar age with the help of self-made machinery, intelligent manufacturing, etc., and advanced production technology.

Among many mechanical self-manufacturing technologies, nano-manufacturing is definitely a very critical production technology.

Bolsaixing people have developed advanced nano-metal materials, and then, through 3D printing technology, combined with artificial intelligence, they have realized the transformation of mechanical self-made, the material production required by the whole society is fully intelligent, and the material is highly developed.

It is precisely with the solid foundation laid by mechanical self-manufacturing, and then upgrading Weili's intelligent manufacturing technology to build a large interstellar spaceship, which is free from planetary gravity, stellar gravity, and even Starfield Weili's technology.

With so many advanced black technologies, there is still a long way to go before they can be reproduced into reality.

Now, Li Yi just wants to use several advanced technologies to tie Jinyuan Technology to his chariot.

Countless thoughts flashed through Li Yi's mind, his face gradually became firm, he looked at Professor Chen Guodong with a smile, and waited for his response.

Professor Liu, Professor Wang and the others looked at each other and smiled bitterly.

"It's so unfair to ask such a question!"

"Shameless! What kind of technical discussion is this!"

"For another question, this kind of question doesn't count."

"Professor Chen, don't pay attention to him, this kid is deliberately embarrassing you."

"..."

Many researchers behind Professor Chen Guodong were filled with righteous indignation and denounced Li Yi with the same hatred.

Li Yi laughed dumbly and asked, "Why, is this question difficult?"

"Isn't it difficult? Do you have an answer?"

"How to solve it? You said so!"

"Do you know the answer?"

"..."

Hearing this, the noisy discussion at the scene stopped, and one after another, hot eyes focused on Li Yi's face, and everyone shouted excitedly.

Looking at the excited crowd, Li Yi smiled. As expected, this is what he wanted.

Powder metal atomization is a technology in the library. It is precisely because of the breakthrough of this technology that the 3D printing technology has been perfected.

Looking at Professor Chen Guodong who was indignant, Li Yi answered with a smile: "High-quality metal powder is the core of 3D printing, and high-quality metal powder materials must have: high purity, high fluidity, uniform size, etc., Harsh metrics."

After a pause, Li Yi looked at the crowd and continued: "It is not difficult to realize this preparation technology, we can achieve the technological requirements of this technology through some process transformation, using electrical exclusion method, data screening method, and implementing precise atomization. ."

"Precise atomization?"

Everyone's eyes lit up, staring at Li Yi, waiting for the next sentence.

3D printing technology is limited by raw materials and has not been able to achieve a major breakthrough. If the dilemma faced by the atomization method can be solved, it can be said that most of the raw material dilemma faced by 3D printing will be solved.

"Yes, the precise atomization method!" Li Yi looked at the crowd and nodded.

Then, Li Yi introduced his design ideas in detail, saying: "Our company has designed a metal powder preparation device, which uses a thermal spray generator to form thermal spray metal droplets; the feeding speed and thermal spray generator parameters are determined by compressed gas. The flow meter, ..., employs a reverse high pressure gas generator on its front side to produce a high velocity gas beam to cool and atomize the thermal spray metal droplets, ..."

"According to its speed and flow, it is controlled by a cooling gas flowmeter, with built-in oxygen sensors, pressure sensors, temperature sensors, and other measuring instruments to monitor the oxygen content, temperature, pressure and other parameters in the chamber in real time, and transmit it to the control system in real time to adjust the key The operating parameters of the components, the feedback filter device, the size of the filter screen, and then calculated by the data center, ... "

"After the whole process is running, according to the characteristics of the metal powder, the size and air pressure of the metal droplet beam are adjusted by adjusting parameters such as air pressure and flow rate, ..., and finally the continuous reaction of atomization is realized, and at the same time, the high pressure and fast speed of the metal droplets are ensured. , the size is small and uniform, which is conducive to improving the quality of the powder; at the same time, it reduces the defect rate of the final powder." Li Yi looked at the stunned crowd and concluded.

After Li Yi's introduction, everyone looked at each other and was speechless for a long time.

According to the idea described by Li Yi, they simulated and ran it in their minds. The design direction of this device seems to be a very feasible solution.

The atmosphere of the scene was quiet, and everyone's eyes focused on Professor Chen Guodong, who was confronting Li Yi.

The opponent has already responded, and now it is Professor Chen Guodong's turn to make a move, otherwise he will lose in this competition.

Xu Xiuyong's eyes lit up, and he looked at Li Yi hotly, as if he was about to say something.

Li Yi smiled at him slightly, nodded his head slightly, and signaled to talk later.

Professor Chen Guodong frowned and thought, feeling an inexplicable pressure from Li Yi, he quickly changed the subject and asked, "Even if the plan you said can be realized, can I ask you one more question?"

Li Yi smiled calmly and nodded happily: "Professor Chen, please give the question."

"Okay, the question is about our cooperative research and development project. What do you think is the most critical and core difficulty of this technology?" Professor Chen Guodong looked at Li Yi with deep meaning and asked.

Hearing this, everyone's spirits were shocked, and their eyes focused on Li Yi's face.

This cooperative research and development project is not easy. It is necessary to realize the development of 3D metal powder printing materials and the supporting printing process. Once realized, it will inject a new vitality into the field of 3D printing manufacturing and greatly promote the application potential of 3D printing. .

3D printing looks beautiful, but after decades of development, it has not replaced an industry as quickly as other industries or captured the vast majority of the share.

For 3D printers, from design to product molding, only raw materials and 3D printers are needed. However, during the long-term operation of 3D printers, the maintenance cost and maintenance difficulty are far greater than the amortized cost of the traditional production chain.

In addition, raw materials are the top priority for any industry, and the performance of the finished product is closely related to the choice of raw materials, especially for 3D printers. Printing raw materials is the core factor of 3D printing technology.

All in all, mature 3D printing technology still seems to be a very distant thing at present.

However, Li Yi's innovative ideas in the field of 3D printing seem to have opened a door to a new world for them, and a miracle is just around the corner.

Facing the excited and inquiring eyes of everyone, Li Yi smiled slightly and answered, "The difficulty of the whole project lies in the configuration of the metal printing materials, and the difficulty of the configuration of the printing materials lies in the in-depth study of the basic effects of metal nanoparticles."

"Well, tell me!" Professor Chen Guodong asked eagerly, looking at Li Yi with shining eyes.

Li Yi nodded and continued: "Metal nanoparticles are ultra-fine particles with a size of 1~100nm. The ratio of the surface atoms to the total number of atoms in the nanoparticles increases sharply with the decrease of the particle diameter, showing that Extremely strong volume effect, quantum size effect, surface effect, macroscopic quantum tunneling effect."

"When the particle scale reaches the nanometer level, the electron energy near the Fermi level of the metal changes from quasi-continuous reading to discrete energy levels. The number of atoms contained in metal nanoparticles is limited, and the energy level spacing is split, ... ."

"When the size of the nanoparticles is comparable to or smaller than the de Broglie wavelength and the coherence length of the superconducting state, or the size of physical features such as the transmission depth, the boundary conditions of the crystalline periodicity will be broken; the surface of the amorphous nanoparticles will be broken. The reduction in the density of atoms near the layer leads to a new volume effect in properties such as acousto-optical electromagnetism and heat, . . . ”

"Using these basic effects of metal nanoparticles, the corresponding metal materials can be prepared by different methods, such as laser evaporation, inert gas cooling, liquid phase reaction, plasma melting, radiation synthesis, ..., etc."

"Well, let me talk about it first. The laser evaporation method uses a laser to rapidly heat up the molecules of the gas-phase reactants to quickly absorb energy and complete the gas-phase reaction in an instant..."

"..."

As Li Yi's explanation continued to deepen, the expressions on the faces of the people at the scene showed a state of confusion one after another.

What is he saying?

Why can't I understand?

What is this guy talking about? So awesome?

…….

The scene was silent, and only Li Yi was left talking, explaining the research ideas of the basic effects of metal nanoparticles and the general direction of the project's scientific research.