【摘要】 本实验采用共沉淀方法制备YAG微粉 ,Al和Y元素分布均匀 ,在 90 0℃煅烧 2h即可全部转变为YAG粉体 ,无过渡相 .15 0 0℃热压 1h可获得致密烧结体 ,其抗弯强度为 2 45MPa ,断裂韧性为 2 .0MPa·m1 /2 ,晶粒大小为 3～ 6μm ;14 0 0℃放电等离子烧结 5min可获得相对密度为 93 %的烧结体 ,其抗弯强度为 3 4 8MPa,断裂韧性为 2 .1MPa·m1 /2 ,晶粒大小为 1～ 2 μm .更多还原

【Abstract】 YAG powder was prepared by co_precipitation method, and Al and Y elements were uniformly distributed in powder. After calcination at 900 ℃ for 2 h, pure YAG phases can be obtained. The powder has good sintering ability, and dense bodies could be obtained by hot_pressing at 1 500 ℃ for 1 h. Its bending strength and fracture toughness are 245 MPa and 2.0 MPa·m 1/2 , respectively. Through SEM observation, the grain size is about 3—6 μm. Spark plasma sintering was also employed to produce sintering body, 93% relative density could be obtained at 1 400 ℃ 5 min. Its bending strength is 348 MPa, and fracture toughness is 2.1 MPa·m 1/2 . Its grain size is about 1—2 μm.更多还原