Technology: The naughty kid ruined my college entrance examination, but I turned over to nuclear fus

"This problem wants to be solved in a short time, it is indeed not simple..."

"Director Lin, you wait a bit, let me take a good look."

Lu Yu got closer, and began to look at the damaged Mars rover through microscopic instruments.

At this look, his brows suddenly tightened!

"It seems that the problem is more troublesome than I thought."

"Coincidentally, it broke on the most critical trigger mechanism, if this problem is not fixed, even if our Mars rover is sent to the sky, it will only become a piece of scrap iron, and it will be of no use!"

"yes."

Director Lin nodded in agreement and sighed,

"That's where the problem arises."

"Our Zhurong uses a different power supply than an ordinary Mars rover. Like the one used by Eagle Country, it is a nuclear battery weighing about 45 kilograms, which is used to power the normal operation trajectory of the rover.

"And we.... Solar panels are selected.

"Compared with nuclear batteries, although the stability of energy supply may be lacking, it is small and lightweight, and it will not delay the normal operation of the rover too much because of the presence of electric panels."

"But... If there is a problem with the trigger mechanism of the electric plate, after entering Mars.

"Its series of detection behaviors, without the supply of energy, can not play a single role at all."

"I originally thought that it would not take much trouble to solve this problem, but after thinking hard for a long time in the past two days, I did not think of a way to repair the trigger mechanism in a short period of time without affecting the normal use of other functions."

Lu Yu blinked and asked,

"Then... If you return to the factory for reconstruction, is there still time?

Although it is not impossible for him to find a core mechanism for replacing this part with materials.

But soon to leave for the ancient camel mountain for the next exoskeleton equipment landing experiment.

If the research design is carried out in such a short time, Lu Yu is worried about the results that will be made in the end.... The effect can backfire.

Director Lin shook his head and said helplessly:

"I'm afraid it's difficult."

"The next series of our experiments, all of which must be based on the normal use of this Mars rover, can further carry out follow-up experiments!"

"If there is no physical reference, the effect of subsequent experiments will only be greatly reduced."

"And if we wait until the end of the return to the factory to carry out the next experiment, the time is a little too tight, and there is no time to launch Zhurong-2 at the original time."

He further explained the general situation to Lu Yu, and the latter's face also showed a look of helplessness.

"It seems."

"We have to find a way to repair or replace the core mechanism of this spring?"

Lu Yu frowned, and once again looked at the Mars rover under the microscopic instrument.

Solar panels used in aerospace are, undoubtedly, a very delicate work, and it is not completely impossible to overcome this difficulty in a short period of time, but... Hurried research, must have destroyed more equipment, and then the difficulty of repairing it will be magnified geometrically!

It's like dancing on a tightrope!

And... There's also a time limit that stipulates that you have to jump out of a full White Swan within a minute!

The difficulty can be imagined!

Suddenly.

A thought burst out in Lu Yu's mind!

"Director Lin, have you ever thought about it.... In another material, replace the original trigger mechanism on the Mars rover? "

Replace?"

Director Lin was stunned.

His original idea was to deal with it in a more conservative way, and it was best to repair the electrical plate on the spring intact according to the original design.

Change the material....

Director Lin really didn't think about it!

"The climate, temperature, terrain, and moisture on Mars are very different from the conditions on our blue star!"

"The selection of every aviation material is selected through thousands of selections!"

"If you rush to change the material, to replace the damaged solar panel spring trigger mechanism... I'm afraid there won't be enough time, and the risk is too great.

Director Lin frowned and said slowly.

"The risk is indeed there, but the reward .... I don't think it will be less!

Lu Yu said brightly.

"I looked at the general structure of the original spring trigger mechanism and found that it was a little too cautious."

"If we use a more suitable material to replace the damaged part, then we can not only solve the original problem, but also greatly improve the operation efficiency of the Mars rover."

"Two birds with one stone, two birds with one stone."

"Director Lin, do you think about it?"

He set his sights on Director Lin.

"This..."

Director Lin's face still had some confusion.

He looked at Lu Yu hesitantly, and asked suspiciously:

"Ordinary materials, I am afraid that it is difficult to use for such delicate work." Mr. Lu, what materials do you think is more suitable for replacement?

"It's true that ordinary materials can't be used with such an elaborate trigger device, but... I thought of a very suitable object, and if it succeeded, it would definitely be able to easily control this trigger mechanism!

Lu Yu smiled slightly and said, "

Director Lin, do you know about memory metal?"

"Memory metal?"

Hearing Lu Yu's answer, Director Lin was slightly stunned, and there was a hint of hesitation in his eyes.

As an expert in the field of aviation, he also has a deep research on materials science, and of course knows what memory metal is!

To briefly explain, memory metal is a special alloy material, which can undergo plastic deformation like plastic at a certain temperature, but can return to its original state at another temperature, with a certain "memory ability".

This phenomenon, called the Shape Memory Effect, is caused by a solid-state phase transition inside the alloy - thermoelastic martensite phase transition.

It's just that this metal due to insufficient stability, and... The research on it is not sufficient, so it is not widely used in the aviation industry, but only briefly in some specific fields!

Hearing that Lu Yu planned to use memory metal to replace the original spring trigger mechanism, he immediately fell into doubt.

"Chief Engineer Lu, do you have any specific plans?"

"There are too many types of memory metals, and the rough score alone can be divided into three types, one-way memory effect, two-way memory effect and full-course memory effect."

"Each effect is different."

"And in detail, it can be divided into many different categories."

"You just say a word about memory metal, I can't understand your specific thoughts."

Director Lin was extremely hesitant.

The one-pass memory effect means that the alloy is deformed at low temperatures and returns to its original shape after heating; The two-pass memory effect refers to the alloy returning to different shapes at high and low temperatures, respectively; The whole memory effect refers to the fact that the alloy returns to the same shape and opposite orientation at high and low temperatures. "

Three different memory alloys, each with a completely different effect!

And that's just rough points!

"Director Lin, I think so!"

"Mars is rugged and the climate is unstable."

"The spring trigger device we originally used is too delicate, even if it is not damaged this time, it will be the shortest to explore after going to Mars... Within ten years, it is very likely to be damaged again! "

And if memory metal is used instead of the original material, it will definitely greatly increase the life of the Mars rover, so that it can shine for a longer time."

Lu Yu said.

He slowly came to the computer, and then through the simulation system in his mind, he roughly built a simple model on the computer.

"Director Lin, look, it's like this."

"If we use memory metal, after replacing the trigger mechanism, we can also deploy more solar panels on the metal to further strengthen the lasting kinetic energy of this Mars rover."

Director Lin leaned over and looked at the rough model that Lu Yujian had built.

Although it seems that there is some meaning of "can only be understood, not spoken", Director Lin can also be regarded as having difficulty understanding what Lu Yu wants to do.

In the model, thanks to the presence of memory metal, the size of the solar panels becomes extremely large.

And... Shrink freely, even if it appears damaged to a certain extent, it can still rely on its memory ability to repair like new.

"Mars receives less solar radiation energy than Blue Star and the Moon, and dust storms often occur on Mars, and dust will cover the solar sails, reducing the efficiency of power generation."

"My design should also ensure that the rover absorbs more during the day and loses less solar energy at night, and we can also design a special optical component and heat-absorbing coating to efficiently transmit and store solar energy, respectively."

Lu Yu further explained.

"Roughly estimated, if the plan I proposed continues, the final energy utilization rate can be increased by 40%... It not only repairs the original damaged part, but also greatly improves the efficiency of energy utilization.

"Although it may take a little more effort and a little more risk."

"But overall, it should be very cost-effective."

Memory metal was conceived in Lu to repair possible damage to solar panels.

Due to the large temperature variation on Mars, solar panels may crack or deform due to thermal expansion and contraction.

Memory metal can undergo plastic deformation at a certain temperature, but can be restored to its original state at another temperature, with a certain "memory ability." Therefore, if memory metal is used as the material or patch of solar sails, the change in temperature difference between day and night on Mars can be used to achieve automatic repair function.

I have to admit, if it can be realized, it is indeed very tempting!

But....

"Chief Engineer Lu, I have heard of an idea similar to your design before."

"I have to admit, it's a bold idea. Once successful, it can greatly improve the reliability and life of the rover's solar panels, reducing maintenance costs and risks.

"However, according to our current calculations, there is not a reliable alloy in the memory metal at this stage that can fully adapt to changes in climatic conditions on Mars."

"At present, this technology is still in the research stage, and it has not been practically applied to any Mars rover, it needs to consider too many factors, alloy composition, crystal structure, phase transition temperature, second phase particles, grain size, twin interface..."

Director Lin frowned and said with a complicated expression.

Why didn't he want to see Lu Yu's idea come true?

But the problem is... The risk required to realize these ideas is too great!

Just talking about the problem of alloy composition, if you can't find enough suitable memory metal to bear the main pressure, even the most basic function of repairing the trigger mechanism may not be able to do it!

Zhurong II was already under a lot of pressure.

If this overly innovative technology is adopted... The pressure will undoubtedly get even greater!

Director Lin did not dare to take risks.

But in the face of such a large project at the national level, he still hopes that he can be steady.

"Director Lin, I understand your concerns."

"But please believe that it is not impossible to replace the original solar panels with memory metal."

It seems to be to strengthen Director Lin's confidence.

He took the lead and said

, "Since you have some understanding of this direction, let's talk about it first,

if you really implement it according to my plan... Which part is the most likely to go wrong?

"If you're really going to do that... What are you going to do with crystal structure constraints?

Director Lin looked at Lu Yu.

He believed that since Lu Yu had proposed this plan, it would certainly not be possible to come up with it just by tapping his brain.

"The crystal structure constraint is indeed the first problem we need to solve, and if the reliability of the memory metal cannot be guaranteed, then getting a puddle of soft mud is a pure waste of time."

"And there are too many variables on Mars."

"Ensuring that the memory metal remains stable in its crystal structure is a difficult problem, but... But it's not impossible.

"As I envision, we can first use B2 phase particles to strengthen memory metals, such as nickel-aluminum alloys." The lattice constant and crystal structure of B2 phase particles are very close to the matrix, which can effectively hinder the shear of dislocations and improve the toughness.

"But... It requires the particles to be as small as possible (nanoscale), otherwise it will lead to brittle fracture; And evenly distributed in the matrix to reduce mismatch and collattice stress.

Lu Yu blurted out almost without the slightest hesitation.

"Strengthening memory metals with B2 phase particles... That's really doable.

"But if that's the case, the crystal structure of the memory metal is certainly stronger than before, but this alone... As if that wasn't enough, right?

A look of hesitation flashed in Director Lin's eyes, and he once again cast his doubtful gaze on Lu Yu.

“.."