稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
902-905
,共4页
超高温陶瓷%ZrB_2-SiC%Yb_2O_3%无压烧结%力学性能
超高溫陶瓷%ZrB_2-SiC%Yb_2O_3%無壓燒結%力學性能
초고온도자%ZrB_2-SiC%Yb_2O_3%무압소결%역학성능
ultra-high temperature ceramics%ZrB_2-SiC%Yb_2O_3%pressureless sintering%mechanical properties
采用沉淀法制备了表面包裹Yb_2O_3的ZrB_2-SiC-Yb_2O_3复合粉体(不同含量的Yb_2O_3作为烧结助剂),并在1900℃无压烧结制备了ZrB_2-SiC-Yb_2O_3复合材料.研究Yb_2O_3添加量对复合材料致密化和性能的影响.结果表明,Yb_2O_3的添加在促进ZrB_2-SiC烧结致密的同时,也提高了ZrB2-SiC复合材料的力学性能.添加10% Yb_2O_3(质量分数, 下同)的ZrB_2-SiC复合材料的相对密度为89%,抗弯曲强度为158 MPa,断裂韧性为2.95 MPa·m~(1/2).
採用沉澱法製備瞭錶麵包裹Yb_2O_3的ZrB_2-SiC-Yb_2O_3複閤粉體(不同含量的Yb_2O_3作為燒結助劑),併在1900℃無壓燒結製備瞭ZrB_2-SiC-Yb_2O_3複閤材料.研究Yb_2O_3添加量對複閤材料緻密化和性能的影響.結果錶明,Yb_2O_3的添加在促進ZrB_2-SiC燒結緻密的同時,也提高瞭ZrB2-SiC複閤材料的力學性能.添加10% Yb_2O_3(質量分數, 下同)的ZrB_2-SiC複閤材料的相對密度為89%,抗彎麯彊度為158 MPa,斷裂韌性為2.95 MPa·m~(1/2).
채용침정법제비료표면포과Yb_2O_3적ZrB_2-SiC-Yb_2O_3복합분체(불동함량적Yb_2O_3작위소결조제),병재1900℃무압소결제비료ZrB_2-SiC-Yb_2O_3복합재료.연구Yb_2O_3첨가량대복합재료치밀화화성능적영향.결과표명,Yb_2O_3적첨가재촉진ZrB_2-SiC소결치밀적동시,야제고료ZrB2-SiC복합재료적역학성능.첨가10% Yb_2O_3(질량분수, 하동)적ZrB_2-SiC복합재료적상대밀도위89%,항만곡강도위158 MPa,단렬인성위2.95 MPa·m~(1/2).
Different contents of ytterbia were used as sintering additive, and ytterbia-coated ZrB_2-SiC powder was produced by heterogeneous nucleation method. At 1900 ℃, ZrB_2-SiC-Yb_2O_3 ceramics composites were prepared by pressureless sintering. The results show that, ZrB_2-SiC has higher relative density and better mechanical properties with the additive of ytterbia. ZrB_2-SiC with 10 wt% Yb_2O_3 has the relative density of 89%. Flexural strength and fracture toughness are 158 MPa and 2.95 MPa·m~(1/2), respectively.
