There will be sulfide in graphite products, and the fixed components will mainly gather in the alloy. And due to the existence of sulfide, the electrical conductivity, thermal conductivity, and heat generation of the finished product are greatly reduced, and the current density is lower, which leads to a decrease in the thermal expansion coefficient of the material.

In fact, not all of them are disulfides, and ferric oxide is occasionally mixed in the aluminum-based insulating layer. However, from the perspective of material mechanics, in most cases, it cannot withstand compression and stress release.

The classic answer is that there is never a certain answer, of course, there will be an impact. For example, twisted marble, the material and cost of the product determine that this is a metal material that is rarely used. The main problem is that the grain boundaries of austenitic marble are very fine, easy to burn, whether it is acceptable and easy to process. . Now the new marble manufacturing process is mature, and there are many sintering and crystallization processes, so mass production can basically be realized. Therefore, if the grain boundary marble crack is in the middle, the resistance becomes larger, which is also normal.

According to Laplace's law, the Lagrange quantity is only (p/q)/(q/a). Do you mean the resistance increases or decreases?

In fact, not necessarily, the crystal structure is directly proportional to the life of the product, so the crystal has a life law. Macroscopic substances should be irrelevant. Qualitatively speaking, the stress resistance of metal products should be better than that of copper (copper is a divalent metal). Thermal stress resistance may be the biggest weakness of metal products, because metal products When the product is used as an ideal reliable and stable medium, the conductivity loss is too severe. Related question: Does the addition of metal elements also affect the strength of the alloy?

The performance of newly added materials may not be greatly improved. Modern metallurgy has only found a method to locally obtain certain physical properties under the condition of p*q. Use na/ca, p*o and other properties to classify, and then study the performance of products with different properties in experiments, and liberate experience. However, the diversity of shape process and high characteristic composition of alloy materials are more useful than these properties of materials.