摘要
采用水冷-强度法测试表征了锂辉石/SiCp紫砂陶试样抗热震性能,结合SEM、XRD等测试分析手段进行物相、微观组织形貌方面分析,在SiCp含量为9%条件下,重点研究锂辉石含量(0—32%)对紫砂陶试样力学和热学性质的影响。结果表明,锂辉石含量为16%时,紫砂陶试样抗折强度达到最大值83.37MPa;含量为24%时,平均热膨胀系数最低,强度保持率达到53.07%最高值,抗热震性能最好;莫来石和β-锂辉石固溶体晶相含量随锂辉石含量增大而增多;试样热震后断口出现裂纹,沿晶断裂是试样断裂的主要方式。
Thermal shock resistance of spodumene/silicon carbide zisha pottery was studied by water cooling-strength method. Phases and microstructure of the pottery were tested and characterized by means of SEM and XRD. Effect of the content of spodumene(0 -32% ) on mechanical and thermal performance of the zisha pottery with 9% SiCp was studied. The results show that the flexural strength at room temperature reaches to its maximum value of 83.37 MPa for the zisha pottery with 16% spodumene. The maximum value of relative remanent flexural strength after thermal shock test is 53.07% , meanwhile the thermal expansion coefficient is the lowest and the thermal shock resistance is the best when the zisha pottery sample contains 24% spodumene. The amount of crystalline phases of mullite and β - spodumene solid solution in the sintered samples increases with the increase of spodumene content. The microcracks occur after thermal shock test, and the intergranular fracture is the main fracture mode for the zisha pottery.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第1期28-33,共6页
Transactions of Materials and Heat Treatment
基金
江西省科技厅资助(2008212)
江西省教育厅资助(GJJ08287)
关键词
紫砂陶
锂辉石
抗折强度
抗热震性
zisha pottery
spodumene
flexural strength
thermal shock resistance