Processing technology of boron carbideagglomerate for radiation shield assembly

Abstract

The invention relates to a processing technology of a boron carbideagglomerate for a radiation shieldassembly, and relates to the technical field of radiation shield assembly material processing. Theprocessing technology comprises the following processing steps of adding weighed and compounded powder into a blender mixer, adding 0 to 25 percent of deionized water for mixing 2 to 6h, and preparingto obtain powder or an emulsion distributed uniformly; adding the uniformly mixed powder or emulsion and a binder and the deionized water with a certain mass fraction into a high-speed stirrer, uniformly stirring, and preparing to obtain an emulsion with a certain solid content for standby use; carrying out spray palletization; pressing; finishing a pressed blank; dewatering and degumming; sintering; packaging. Traditional filling boron carbide powder or a boron silicon resinshielding material is replaced with a whole boron carbideagglomerate or a boron carbideagglomerate assembly block for filling, so that on the basis of meeting the radiation shield performance, the preparation process is simplified, the production cost is reduced, volume production of the boron carbideagglomerates withhigh-precision specifications is realized, and the practicability is higher.

Description

technical field [0001] The invention relates to the technical field of material processing of radiation shielding components, in particular to a processing technology of boron carbide sintered blocks for radiation shielding components. Background technique [0002] Based on B 4 C has excellent physical and chemical properties, so it is widely used in high-tech industries such as electronics, nuclear power, military, and automobiles. It is widely used in structural materials, chemical materials, radiation protection materials and bulletproof materials. B 4 The production of C composite materials has greatly promoted the development of my country's high-tech industries and enhanced the performance of many equipment. [0003] due to B 4 C is a compound with extremely high covalent bonds, as high as more than 90%, and has strong grain boundary resistance. It is a special ceramic material that is extremely difficult to sinter and process. A single B 4 C sintering is difficult...

AI Technical Summary

Problems solved by technology

[0005] Preparation B at this stage 4 The methods of C special ceramic materials mostly focus on the three sintering processes of pressureless sintering, reaction sintering and hot pressing sintering. Among them, reaction sintering is prone to local uneven shrinkage, which makes it difficult to guarantee the dimensional accuracy, and the sintered material is difficult to process In addition, reaction sintering is prone to incomplete reaction and more SiC and C free phases remain. The existence of free phases seriously affects the mechanical properties of ceramic materials; the physical and chemical properties of ceramic materials obtained by hot pressing sintering are the best, and the dimensional accuracy is higher , but the manufacturing cost is high, the production capacity is low, the size and shape are limited, and it is difficult to achieve industrial mass production, which needs to be improved urgently