Study on the Flexible Erosion Reducing Additive Containing Silicon and Boron

Abstract

In view of the severe erosion and wear of gun barrels, we first briefly introduce the research status of erosion reducing additives in this article. Based on these analyses, polydimethylsiloxane (PDMS)-Na2B4O7 additive and PDMS-H3BO3 additive are designed and prepared. These two additives are very flexible and can be folded or bent in any direction. After that, the erosion reducing performance of paraffin wax (PW)-TiO2 additive, PDMS-Na2B4O7 additive and PDMS-H3BO3 additive are studied through the vented vessel test. The results show that the erosion reducing performance of PDMS-Na2B4O7 additive and PDMS-H3BO3 additive is better than that of PW-TiO2 additive. But PDMS-Na2B4O7 additive cannot be completely burned and there are residues at the loading position of additives. PDMS-H3BO3 additive can provide the best erosion reducing performance and without residues. Therefore, PDMS-H3BO3 additive is selected for further research. The effect of granularity of H3BO3 on the erosion reducing performance is studied and compared with PW-TiO2 additive. The results show that the erosion reducing rate of PDMS-H3BO3-500 mesh additive and PDMS-H3BO3-3000 mesh additive is increased by 6.24% and 6.46%, respectively, compared with PW-TiO2 additive. PDMS-H3BO3-3000 mesh additive can provide better erosion reducing performance. But the granularity of H3BO3 has no obvious effect on the erosion reducing performance.