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Preparation method of B4C-Al2O3 composite ceramic
The invention discloses a preparation method of B4C-Al2O3 composite ceramic, which belongs to the technical field of powder metallurgy. According to the preparation method, B4C, alpha-Al2O3 and graphite are used as raw materials; Y2O3 is preferably used as a sintering aid; through ball milling and mixing, spark plasma sintering (SPS) is adopted; the B4C-Al2O3 composite ceramic is prepared; Y2O3 isused as the sintering aid; spark plasma sintering is adopted in the range of 1350 DEG C to 1500 DEG C; the B4C-Al2O3 complex-phase ceramic which is close to complete compactness can be prepared; thedensification rate (4*10<-3>/s) is very high; when the content of Y2O3 is 1.0 vol%, the relative density of the B4C-Al2O3 composite ceramic reaches 98.60%; the B4C-Al2O3 multiphase ceramic prepared bythe method has the hardness of 23.75 GPa, the fracture toughness of 4.89 MPa.m<1/2> and the bending strength of 464.96 MPa, and the sintering temperature of the B4C-Al2O3 multiphase ceramic is reduced to 1500 DEG C or below.
本发明公开了一种BC‑AlO复相陶瓷的制备方法，属于粉末冶金技术领域；本发明以BC、α‑AlO和石墨为原料，优选以YO为烧结助剂，然后经过球磨混料，采用放电等离子烧结(SPS)，制备BC‑AlO复相陶瓷，本发明以YO为烧结助剂，在1350‑1500℃范围采用放电等离子烧结，可以制备接近完全致密的BC‑AlO复相陶瓷，并具有很高的致密化速率(4×10/s)，YO含量为1.0vol％时BC‑AlO复相陶瓷的相对致密度达到98.60％，硬度为23.75GPa，断裂韧性为4.89MPa·m，抗弯强度为464.96MPa，并且将BC‑AlO复相陶瓷的烧结温度降低至1500℃以下。
Preparation method of B4C-Al2O3 composite ceramic
The invention discloses a preparation method of B4C-Al2O3 composite ceramic, which belongs to the technical field of powder metallurgy. According to the preparation method, B4C, alpha-Al2O3 and graphite are used as raw materials; Y2O3 is preferably used as a sintering aid; through ball milling and mixing, spark plasma sintering (SPS) is adopted; the B4C-Al2O3 composite ceramic is prepared; Y2O3 isused as the sintering aid; spark plasma sintering is adopted in the range of 1350 DEG C to 1500 DEG C; the B4C-Al2O3 complex-phase ceramic which is close to complete compactness can be prepared; thedensification rate (4*10<-3>/s) is very high; when the content of Y2O3 is 1.0 vol%, the relative density of the B4C-Al2O3 composite ceramic reaches 98.60%; the B4C-Al2O3 multiphase ceramic prepared bythe method has the hardness of 23.75 GPa, the fracture toughness of 4.89 MPa.m<1/2> and the bending strength of 464.96 MPa, and the sintering temperature of the B4C-Al2O3 multiphase ceramic is reduced to 1500 DEG C or below.
本发明公开了一种BC‑AlO复相陶瓷的制备方法，属于粉末冶金技术领域；本发明以BC、α‑AlO和石墨为原料，优选以YO为烧结助剂，然后经过球磨混料，采用放电等离子烧结(SPS)，制备BC‑AlO复相陶瓷，本发明以YO为烧结助剂，在1350‑1500℃范围采用放电等离子烧结，可以制备接近完全致密的BC‑AlO复相陶瓷，并具有很高的致密化速率(4×10/s)，YO含量为1.0vol％时BC‑AlO复相陶瓷的相对致密度达到98.60％，硬度为23.75GPa，断裂韧性为4.89MPa·m，抗弯强度为464.96MPa，并且将BC‑AlO复相陶瓷的烧结温度降低至1500℃以下。
Preparation method of B4C-Al2O3 composite ceramic
一种B4C-AlO复相陶瓷的制备方法
JIANG XIAOSONG (author) / LYU XINGXING (author) / SUN DAMING (author) / TAN WENYUE (author) / GAO QI (author) / SUN HONGLIANG (author) / ZHAO ZIYOU (author)
2020-06-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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