Toughening effect of mullite whisker within low-density ceramic proppants

Author:

Hao Jianying1ORCID,Mu Baolin1,Gao Yunfeng1,Bai Pinbo2,Tian Yuming13,Li Guomin1

Affiliation:

1. Department of Mechanical Engineering, Institute of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China

2. Changqing Fracturing Proppant Co. Ltd, Yangquan, China

3. Shanxi Engineering Vocational College, Taiyuan, China

Abstract

Main crystal phases of low-density ceramic proppants prepared by bauxite and feldspar are granular corundum and whisker-shaped mullite. Mullite whiskers are interlocked with one another and piled up inside the pores. High aspect ratio of mullite whiskers inside the pores can greatly enhance the fracture toughness. The dominant toughening mechanism for the proppants is attributed to crack bifurcation and deflection and pulling out and bridging effect of mullite whiskers.

Funder

Shanxi Province Science and Technology Major Special Project

Publisher

SAGE Publications

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