The Necromancer of Hogwarts

"Grind bones into powder and charcoal into powder. Mix the two in a ratio of 1:10 and add concentrated sulfuric acid."

"Then keep it warm for another day at high temperatures."

"Add it after the heat preservation is completed..."

Xiang Yu told Zuo Wei his translated recipe.

The recipe is not too long, and the preparation steps are full, which is half a page of A4 paper. Its complexity is roughly equivalent to the content of a college chemistry experiment class.

The raw materials are not hard to come by. In addition to the two main ingredients of bone meal and charcoal powder, other required reagents can also be purchased relatively easily. This is the best news for Xiang Yu and the others.

In less than two days, Zuo Wei purchased all the required raw materials, and the two of them started configuring it according to the steps on the formula.

The recipe for bone powder didn't specify what kind of bone it was, so Xiang Yu prepared some of what he could get.

Charcoal powder is also easy to get. Just buy a few pieces of charcoal and grind it into powder in a mortar.

Gudu, Gudu.

Watching bone meal and charcoal powder being mixed in concentrated sulfuric acid, Xiang Yu and Zuo Wei put them into the incubator and quietly began to wait.

Another day later, when all the steps were completed, Xiang Yu saw a gray-black powder in the flask.

This kind of powder feels very fluffy, and Xiang Yu guessed that it should have a loose and porous structure inside.

Thinking about the raw materials needed to prepare this powder, Xiang Yu had his own guess about this powder.

"The main material here is bone meal, and its main component is calcium hydroxyphosphate. But unlike pure calcium hydroxyphosphate, the calcium hydroxyphosphate in humans or bones is accumulated in a special structure."

"This structure is the result of natural selection. Only by stacking it in this way can the accumulated bones obtain the highest strength with the lowest quality. Creatures with this structure are more likely to survive. In the long process of natural selection , that’s all the skeletal structures we can see today.”

"Perhaps the structural basis of this powder is this packing structure found in nature."

"The charcoal adheres to the structure of the bone meal, completely covering it."

"Finally, under the action of concentrated sulfuric acid, the impurities in the bones are dissolved, leaving only a special structure composed of calcium and carbon."

"And under high temperatures and subsequent processing, this structure absorbs the excess carbon powder and begins to grow, forming a special calcium-carbon grid that stacks together to create the powder I see?"

"If this powder can be explained scientifically, maybe it is a bionic material?"

Xiang Yu was just guessing and didn't know the specific formation principle of this powder.

"It's just a bionic material."

"It is difficult to reverse the production process of materials. If it is a bionic material, it will be even more difficult."

"This powder will only be supplied by us alone for a long time and that's our business opportunity."

He looked at Zuo Wei: "We have to cast a batch of metal ourselves to try it out and see if this powder can really produce the expected effect."

It happened that Zuo Wei's machinery factory had a stove, so they simply started the experiment today.

Steelmaking and casting are originally very complex processes, and materials science has a large section dedicated to describing the corresponding processes, which involves complex fields such as crystallography, nucleation kinetics, thermodynamic models, etc.

However, Xiang Yu and the others just wanted to roughly test the performance of this condensing agent, so there was no need to make it so complicated.

“We buy steel ingots from the same manufacturer, the same batch, and the same model to minimize errors caused by the material itself.”

"Then we melt them into molten steel under the same conditions."

"Two control groups were set up, using the two most common coagulants."

"Corresponding to each control group, set up ten experimental groups and add ten gradient concentrations of coagulant respectively."

“Finally, the mechanical properties of the experimental and control group samples were tested to determine whether the powder could work.”

Xiang Yu made a crude plan based on the little experimental knowledge he had left in his mind, and then took Zuo Wei to start preparations.

There is a batch of steel ingots stored in the machinery factory, which are left over from previous purchases. Since work has not started recently, these steel ingots have always been kept here, just for Xiang Yu and the others to do experiments.

In order to ensure consistent errors, Xiang Yu simply used skeleton warriors to conduct experiments.

The benefits of using Skeleton Warriors are numerous.

Their movements are as precise as machinery, and there is absolutely no hand shaking due to emotional or physiological reasons.

You must know that the temperature of molten steel is quite high, and the container containing molten steel is very heavy. If the process is completed manually, the final error will be large.

Many metal laboratories do not have automated conditions and rely on students to manually pour molten steel into the molds.

After pouring the first batch, you're done with the second batch.

My hands were sore, and I was sweating from the heat. My movements were slow, and I couldn't carry the container for a long time, and I had to be scolded by my senior brother or boss.

"You haven't eaten yet? Try harder! Hurry up! If you don't hurry up, this material will be useless!"

In the end, the performance of the same batch of samples fluctuated greatly, and I was confused after measuring the data.

There will be no such problem with skeleton warriors. Their movements are uniform and precise.

If Xiang Yu can summon hundreds of skeletons in the future, it will be like having a fully automatic production line of his own.

And there is another advantage of using skeletons, it saves effort.

Moving containers worth tens of kilograms here and there, and sometimes having to dump them slowly, is sometimes as physically demanding as a construction worker. Who would be willing to suffer this if there was another way.

Under Xiang Yu's instructions, the three skeleton warriors performed various operations accurately.

They run back and forth in the machinery factory, carrying steel ingots and containers, not afraid of the hot furnace temperature, working diligently in a working environment that can cause heat stroke, and will not accuse Xiang Yu of exploitative behavior in their hearts.

Simply the perfect workforce.

Soon, in less than a day, the skeletons completed the preparation of twenty-two sets of steel materials.

Then came the exploitation of them. Who made them not tired at all, but still so energetic and with their eyes so wide open.

Here is a popular science. Testing the mechanical properties of metals is not just about knocking them against each other to see who is stronger. There is a set of standard procedures.

Generally, everyone makes sheet specimens and tests the tensile properties first.

The so-called sheet specimens have a special set of size standards. They must first cut thin slices of corresponding shapes on the steel plate before they can be tested.

This process is very troublesome. Fortunately, Zuo Wei's machine shop has wire cutting machines, and no one here is trying to snatch the machines. The skeleton's determination to complete the task is as determined as the students who come to snatch the machines late at night.

After two full days passed, twenty-two groups of sheet specimens were cut.

Then you have to polish the sample, which is an extremely boring process.

The sheet-shaped samples made of steel must first be polished with sandpaper to remove scratches and other defects on the surface left by the cutting process.

Otherwise, if there are defects on the surface, when the performance is tested, the defects will break before the performance limit of the material is reached, and the measured error will be shockingly large.

Sand with coarse sandpaper first, then fine sandpaper, be careful, be gentle, and use even pressure.

If any finger exerts too much force and grinds a sloping area on the originally flat sample, then congratulations, you won't be able to enter the next sandpaper until it is smoothed.

After about four rounds of sandpaper have been used and the surface of the sample has no defects and is as smooth as a mirror, you can proceed to the next step.

The next step is polishing, using a special polishing paste to further smooth the sample.

There are three or four polishing processes, which last about half an hour.

Only when there are no scratches on the surface of the final sample, and your nose hair can really be reflected like a mirror, can it be sent for performance testing.

During this period, if your hands shake during a process and scratches are left on the surface of the sample, then rework and grind again.

There are twenty-two groups of samples, and five pieces are prepared for testing in each group to avoid errors.

After grinding these more than one hundred samples, a student would have to vomit three liters of blood. After graduation, he would immediately change careers and never work in this field again.

Xiang Yu once had to grind a sample from eight in the morning to ten in the evening. His hands were almost worn out by the sandpaper and he was still not finished. At the end of the grinding, the laboratory teacher came to drive him away, and he burst into tears. Came down.

Fortunately, it's the skeletons that are here to polish the samples now, and there aren't that many moths.

When more than a hundred shiny samples were sealed in sample bags, testing could finally begin.

Put the stretched sample on the stretching machine. Today's stretching machines are still manual. After all, even computers are not yet popular.

But it doesn't matter, Xiang Yu is only familiar with manual ones. The ones he used back then were manual ones...because the department was poor.

Quickly measure the size and thickness of the sample, then start the tensile machine to test the tensile data.

Ten minutes later, with a loud bang, the sample was pulled off, and the fracture was a 45-degree inclined fracture.

Xiang Yu nodded, put the recorded data aside, then adjusted the machine and placed the next sample.

A week later, Zoe Wei hurried into the factory after finishing her meditation.

"How's it going? Are the test results out?"

Xiang Yu looked tired, pinched his eyebrows, his face seemed a little heavy, and he had a notebook in front of him.

Zuo Wei's heart skipped a beat: "Failed? This powder doesn't have the defect-reducing properties we expected?"

Only then did Xiang Yu slowly grin and spread out the book.

A gust of wind blew outside, and the notebook was filled with beautiful stretching curves until it was turned to the last page.

"After testing, we can preliminarily confirm that the coagulant has the effect of reducing internal defects during the casting process. The tensile strength of samples prepared using this coagulant is 20% higher than that of samples using general coagulants, and the toughness is 30% higher %."

"In short, we succeeded."

"Let's go, have a good sleep first, and then go find our buyer."