Date：2022-09-09 15:57:15

Failure analysis of metal materials is a technology to analyze and study the damage causes of metal components or equipment that have lost their original functions. Technical analysis of major accidents caused by failure of metal materials is a complex process, which not only involves macro analysis, microstructure analysis, metallographic structure analysis, chemical composition analysis, hardness test, mechanical property test, stress test and other analysis and testing technologies, but also needs to combine a large number of test data and comprehensive information, including design scheme, heat treatment situation and use environment, Carry out a comprehensive and systematic discussion and analysis, and finally conclude and deduce the main causes of failure. Next, we mainly introduce the judgment basis of brittle fracture and ductile fracture. Let's have a look. View >>

Date：2022-09-09 15:54:51

When the humidity of the storage environment of electronic components is too high, moisture will enter the IC device through the bonding surface of the packaging materials and components, causing oxidation, corrosion and short circuit of the internal circuit, and the high temperature in the assembly and welding process will cause the humid gas entering the IC to expand and generate pressure, causing the plastic to separate from the inside of the chip or lead frame (delamination), wire binding damage, chip damage, internal cracks and cracks extending to the surface of the component, Even components swell and burst, which will lead to assembly repair or even scrapping. More importantly, those invisible and potential defects will be incorporated into the product, causing problems in the reliability of the product. Most other IC electronic components also have the hazard of moisture. It is very important to dry electronic components to remove oxidation. This article collects and collates View >>

Date：2022-09-08 17:25:23

Neutral salt spray test and alternating salt spray test are two types of corrosion environment test which are frequently used in salt spray test. In most cases, the neutral salt spray test uses a standard salt spray test chamber, and the alternating salt spray test process is more complex, using a composite salt spray test chamber. What are the differences between neutral salt spray test and alternating salt spray test? In addition to neutral salt spray test, salt spray test also includes acid salt spray test, acetate salt spray test, etc. neutral salt spray test and alternating salt spray test are also two types of corrosion environment test that are frequently used in salt spray test. What are the differences between them? Let's have a look! View >>

Date：2022-09-08 17:22:35

Nondestructive testing is divided into conventional testing technology and unconventional testing technology. Conventional testing technologies include ultrasonic testing (UT), radiographic testing (RT), magnetic particle testing (MT), penetrant testing (PT) and eddy current testing (ET). Unconventional nondestructive testing technologies include acoustic emission (AE), infrared (IR), laser holographic testing Holo View >>

Date：2022-09-07 16:46:21

Metallographic analysis is to observe the sample after grinding, polishing and etching through an optical microscope, which can analyze the true microstructure and morphological characteristics of the sample, and is the basis of the study of material mechanical properties. To a certain extent, the metallographic inspection of ordinary steel is not difficult, but with the application of new materials and technologies, the inspection range is constantly increasing, and the types of samples are also increasing. More countermeasures and technical methods are needed for practitioners. View >>

Date：2022-09-07 16:42:35

Galvanic corrosion, also known as dissimilar metal corrosion or contact corrosion, refers to the phenomenon that when two materials with different electrochemical properties form a circuit with the surrounding media, the corrosion rate of the metal with positive potential slows down, while the corrosion of the metal with negative potential accelerates. The evaluation methods of galvanic corrosion of materials or components mainly include exposure evaluation experiments and electrochemical measurements. This article has collected and sorted out some materials, hoping to have greater reference value for all readers. View >>

Date：2022-09-07 16:40:56

The finer the salt spray particles, the larger the surface area formed, the more oxygen absorbed, and the stronger the corrosion. More than 90% of salt spray particles in nature have a diameter of less than 1 micron. Research results show that the oxygen adsorbed on the surface of salt spray particles with a diameter of 1 micron is relatively balanced with the dissolved oxygen in the particles. View >>

Date：2022-09-05 15:29:37

Capacitor is a kind of device that can accommodate electric charges. It is one of the electronic components widely used in electronic equipment. It is widely used in circuit isolation, AC, coupling, bypass, filtering, tuning loop, energy conversion, control and so on. The detection of capacitors can be divided into three categories: the detection of fixed capacitors, the detection of electrolytic capacitors and the detection of variable capacitors. What are the detection methods of capacitors? Detection technology plays an important role in all walks of life. Through detection, we can ensure product quality to a certain extent. View >>

Date：2022-09-05 15:27:30

It is necessary for manufacturers to ensure the safety and reliability of each component produced. With the higher and higher quality requirements of electronic products, inevitable defects will appear in the processing process. At this time, it is necessary to carry out various tests on the produced components. The quality of electronic products also plays a vital role in the development of the industry and social stability. The following is a brief analysis of the importance of DPA analysis and detection of electronic components for your reference. View >>

Date：2022-09-02 16:27:45

PCB has become the most important and key part of electronic information products. Its quality and reliability level determine the quality and reliability of the whole equipment. If the PCB has defects or manufacturing problems, the final product may fail and cause inconvenience. In these cases, manufacturers will have to recall these devices and spend more time and resources to repair the faults. PCB testing has become an indispensable part of the circuit board manufacturing process. It finds problems in time, assists staff to deal with them quickly, and ensures the high quality of PCB. View >>