Study on the composition and sintering process of a new high performance impact and bulletproof ceramic

DOI:	10.11809/bqzbgcxb2023.10.003
Keywords:	sintering aid; hot pressing sintering; impact resistance; peak load; sintering process curve
Abstract:	In order to improve the impact resistance of silicon carbide protective armor materials, a model simulation study was established based on Materials Studio to investigate the good thermal stability and crystallinity of Al BN C system additives in SiC at high temperatures. The effectiveness of the simulation was verified through experiments. Using silicon carbide micropowder as raw material, Al BN C system sintering aids and Al2O3 Y2O3 MgO system sintering aids were added to the raw material. After hot pressing sintering, the impact resistance of the two ceramics was compared. Under the conditions of 1 950 ℃ , 30 MPa, and 60 minutes of insulation and pressure holding, the Al BN C system aids, due to the formation of the liquid phase, made the impact resistance of SiC ceramics more superior. When the Al∶BN∶C sintering aid system had a 2∶1∶1 ratio, The Vickers hardness of SiC ceramics reaches 2732.6 HV, the density reaches 98.6%, and the peak impact load resistance reaches 18 383.58 N. Based on the optimal impact resistance, the hot pressing sintering process curve of SiC ceramics is obtained.
Issue:	Vol. 44 No. 10 (2023)
Published:	2023-10-28
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