Synthesis, microstructure and property characterization of Mo4Y2Al3B6 ceramic fabricated by spark plasma sintering

被引：4

作者：

Du, Lijing ^{[1
]}

Zhang, Qiqiang ^{[1
]}

Cao, Lei ^{[1
]}

Fu, Shuai ^{[2
]}

Wan, Detian ^{[2
]}

Bao, Yiwang ^{[2
]}

Feng, Qingguo ^{[1
]}

Grasso, Salvatore ^{[1
]}

Hu, Chunfeng ^{[1
,3
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China

[2] China Bldg Mat Acad, State Key Lab Green Bldg Mat, Beijing 100024, Peoples R China

[3] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2023年 / 43卷 / 05期

关键词：

Mo4Y2Al3B6; Spark plasma sintering; Synthesis process; Microstructure; Properties; THEORETICAL PREDICTION; MECHANICAL-PROPERTIES; PHASES; TI2ALC; TI5AL2C3; BORIDES; TI3ALC2; CR3ALB4; CR2ALB2; AL2O3;

D O I：

10.1016/j.jeurceramsoc.2022.12.013

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polycrystalline Mo4Y2Al3B6 ceramic (92.84 wt% Mo4Y2Al3B6 and 7.16 wt% MoB) was prepared by spark plasma sintering at 1250 degrees C under 30 MPa using Mo, Y, Al, and B as starting materials. The dense sample obtained has a high relative density of 96.6 %. The average thermal expansion coefficient is 8.38 x 10(-6) K-1 in the range of 25-1000 degrees C. The thermal diffusivity decreases from 6.50 mm(2)/s at 25 degrees C to 4.33 mm2/s at 800 degrees C. The heat capacity, thermal conductivity, and electrical conductivity are 0.30 J center dot g(-1)center dot K-1, 11.73 W center dot m(-1)center dot K-1, and 0.66 x 106 Omega(-1)center dot m(-1) at 25 degrees C, respectively. Vickers hardness with increasing load in the range of 10-300 N at room temperature decreases from 10.82 to 9.49 GPa, and the fracture toughness, compressive strength, and flexural strength are 5.14 MPa center dot m(1/2), 1255.14 MPa, and 384.82 MPa, respectively, showing the promising applications as structural-functional ceramics.

引用

页码：1880 / 1886

页数：7

共 44 条

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