"Yes, yes, let's visit first. Saying that, Li Gong wiped his red eyes, and then said with a smile.

Academician Tu looked at these people standing behind him, and also diǎn diǎn head.

Immediately Li Gong and Wu Gong diǎndiǎn head, and then guided everyone to go outside through a door in guò, and when they walked outside, Li Gong pointed to these buildings and introduced with a smile: "Teacher, chief, this is the location of our entire material room, which is composed of multiple parts. At present, we classify inorganic non-metals, mainly including ceramic materials, semiconductor materials, and some engineering plastic materials, etc., which are mainly in the west row of buildings. The area with the most buildings to the north is this metal material research area. Under this, we are divided into ferrometallic metal (ferrous metals), non-ferrous metals, alloy materials and other research Bomei, specifically for this metal this part of the research. ”

"These buildings over here. Li Gong pointed and said: "This is the research area of composite materials, and the composite materials are composed of two or more materials in an appropriate combination. Generally, one material is used as the matrix and the other material is used as the reinforcement. For example, we extract the fibers of a variety of woods, and then form a composite panel, which is no less harder than some metal materials, and its flexibility is much better than most metals. That's the general classification we have at the moment, but we're planning to develop a new module, which is this polymer material. We are still in a blank stage, and other countries in the world have already made great achievements, and we should also catch up. It's just that our ability is limited that we can't support this kind of research. However, Xiao Jiang has promised me that in the future, as soon as our economic conditions permit, we will immediately carry out research work in this area. ”

"Confused!" Academician Tu interrupted: "Polymer materials technology is a technological revolution in materials science. In order to say that mastering this aspect is equivalent to mastering the production lifeline of high-precision process equipment. It's really short-sighted. You've learned everything you've learned before. ”

was scolded by Academician Tu like this, and Li Gong's face was flushed.

Jiang Chen looked at the embarrassed expressions of several people and then quickly explained: "Old Tu, we are to blame for this matter, we didn't think it through. Wait for us once 'dǐng'diǎn' small 'say,.2↘3.o∧s_(); If you have spare funds, you can start this right away. Besides, that's what we want to do. There are no talents in this area. You know the current situation in China, basically those who have diǎn knowledge in this area or who graduated from colleges and universities at that time are all asked to leave by others, and it is very difficult in this situation like ours, and not many people are willing to come. ”

"Isn't there still me, as long as you build it up, I'll find someone for you, but if it doesn't work, I'll come here in person. Academician Tu interrupted with a wave of his hand.

Hehe, looking at Deputy Director Song's expression, Jiang Chen said with a smile: "That feeling is good." I'll make a note of it first, and I'll do it as soon as we have the money. ”

"Let's go, let's not take a look. "Academician Tu diǎndiǎn head said.

"Okay. Li Gong began to guide everyone to this inorganic non-metal research area.

After everyone entered, Li Gong pointed to the facilities inside and the busy crowd and said, "This is this inorganic non-metal research group. They mainly study this non-metallic material, and at present, we are mainly researching this high-strength ceramic, as well as this engineering plastics. The product you see now is our automotive ceramic brake pads made from high-strength ceramics. We mix the metal powder of this intended ingredient with high clay and fire it at high temperatures, which forms a special type of ceramic. We call it high-strength ceramics or cermets. It is a material made from metal and ceramic raw materials, and has some of the best diǎn of both metal and ceramic. Such as the toughness and bending resistance of the former, and the high temperature resistance, high strength and oxidation resistance of the latter. Due to high-speed and vigorous braking, the brake pad produces high temperature on the friction surface, which can reach 800~900 degrees, and some are even higher. At this high temperature. A similar reaction will occur on the surface of the brake pad by cermet sintering, so that the brake pad has good stability at this temperature. The traditional metal brake pads will not produce a sintering reaction at this temperature, because the surface temperature rises sharply, the surface material will melt and even produce air cushions, which will cause a sharp reduction in braking performance or a complete loss of brakes after continuous braking. And after installing ceramic brake pads, in normal driving. No unusual screaming (i.e., scraping sounds) is produced. Because ceramic brake pads do not contain metal, they avoid the metal noise of traditional metal brake pads rubbing against each other (i.e. brake pads and brake discs). In the process of braking, due to the heat generated by friction and the increase of working temperature, the friction material of general brake pads is affected by temperature, and the friction coefficient begins to decrease. When the temperature of the brake disc reaches 650 degrees, the friction coefficient of the ceramic brake pad is still about 0, which can ensure that the vehicle has good braking performance. Moreover, ceramics have good thermal stability, low thermal conductivity, and good wear resistance. The long-term use temperature is 1000 degrees, which makes the ceramic suitable for the high-performance requirements of various high-performance brake materials, and can meet the technical requirements of brake pads such as high speed, safety and high wear resistance. ”

Seeing that Li Gong said so much, Deputy Director Song on the side looked at the gray-white brake pad in front of him, and then said with some worry: "We all know that this ceramic is fragile." In the fit of car braking, the brake pads of the Securities Regulatory Commission have undergone tremendous force. So is this brake pad of yours capable of withstanding so much force? ”

"The chief's question is a good one. Li Gong now praised: "This is also the most troublesome thing for us to develop this ceramic brake pad at the beginning." But do you remember the cermet I just talked about, it's a great solution to this problem. Our brake pads have good mechanical strength and physical properties and are able to withstand high pressures and shear forces. Before the friction material products are assembled and used, they need to be drilled, assembled and other mechanical processing to make brake pad assembly. Therefore, it is required that the friction material must have sufficient mechanical strength to ensure that it will not be damaged and broken during processing or use. And it lasts a long time, almost twice as long as regular brake pads. The service life of our general ordinary brake pads is less than 60,000 kilometers, while the service life of ceramic brake pads is more than 100,000 kilometers. ”

"Oh, such a good material, this is a very good promotion for our high-tech industry. Deputy Director Song looked at Jiang Chen with some displeasure and said, "I said, Xiao Jiang, you can't take this standardism." ”

(To be continued.) )