Effect of heat treatment temperature on structure and mechanical properties of Si3N4p/Al composites

Yang Wei Wang; Xiao Dong Yu; Fu Chi Wang; Wei Guan Zhang; Zhuang Ma

Effect of heat treatment temperature on structure and mechanical properties of Si₃N_4p/Al composites

Yang Wei Wang^*, Xiao Dong Yu, Fu Chi Wang, Wei Guan Zhang, Zhuang Ma

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Si₃N_4p/Al composites prepared by squeeze casting were heat treated at 800-950°C. The phases, flexural strength, hardness, KIC and fracture morphology of the composites were tested and examined by XRD and SEM. The results indicate that 850°C is a critical temperature for heat treatment at which there occurs notable interface reaction between β-Si₃N₄ and aluminum, and hardness and strength of the composites significantly increases after heat treatment at temperature higher than 850°C, but its KIC decreases. Experiments of 45%vol Si₃N_4p/Al composites heat treated at 950°C show that the flexural strength, hardness, and KIC are 498MPa, 373HBS5/750, and 7MPa·m^1/2, respectively, indicating a good combination of strength and toughness. Transgranular cleavage of Si₃N₄ particles and ductile tearing of Al alloy matrix prevails, and debonding of Si₃N₄ particle/Al alloy interface is also observed in the composites.

Original language	English
Pages (from-to)	36-39
Number of pages	4
Journal	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume	29
Issue number	5
Publication status	Published - Oct 2008

Keywords

Heat treatment
Interface reaction
Mechanical property
SiN/Al composites

Cite this

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title = "Effect of heat treatment temperature on structure and mechanical properties of Si3N4p/Al composites",

abstract = "Si3N4p/Al composites prepared by squeeze casting were heat treated at 800-950°C. The phases, flexural strength, hardness, KIC and fracture morphology of the composites were tested and examined by XRD and SEM. The results indicate that 850°C is a critical temperature for heat treatment at which there occurs notable interface reaction between β-Si3N4 and aluminum, and hardness and strength of the composites significantly increases after heat treatment at temperature higher than 850°C, but its KIC decreases. Experiments of 45%vol Si3N4p/Al composites heat treated at 950°C show that the flexural strength, hardness, and KIC are 498MPa, 373HBS5/750, and 7MPa·m1/2, respectively, indicating a good combination of strength and toughness. Transgranular cleavage of Si3N4 particles and ductile tearing of Al alloy matrix prevails, and debonding of Si3N4 particle/Al alloy interface is also observed in the composites.",

keywords = "Heat treatment, Interface reaction, Mechanical property, SiN/Al composites",

author = "Wang, {Yang Wei} and Yu, {Xiao Dong} and Wang, {Fu Chi} and Zhang, {Wei Guan} and Zhuang Ma",

year = "2008",

month = oct,

language = "English",

volume = "29",

pages = "36--39",

journal = "Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment",

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TY - JOUR

T1 - Effect of heat treatment temperature on structure and mechanical properties of Si3N4p/Al composites

AU - Wang, Yang Wei

AU - Yu, Xiao Dong

AU - Wang, Fu Chi

AU - Zhang, Wei Guan

AU - Ma, Zhuang

PY - 2008/10

Y1 - 2008/10

N2 - Si3N4p/Al composites prepared by squeeze casting were heat treated at 800-950°C. The phases, flexural strength, hardness, KIC and fracture morphology of the composites were tested and examined by XRD and SEM. The results indicate that 850°C is a critical temperature for heat treatment at which there occurs notable interface reaction between β-Si3N4 and aluminum, and hardness and strength of the composites significantly increases after heat treatment at temperature higher than 850°C, but its KIC decreases. Experiments of 45%vol Si3N4p/Al composites heat treated at 950°C show that the flexural strength, hardness, and KIC are 498MPa, 373HBS5/750, and 7MPa·m1/2, respectively, indicating a good combination of strength and toughness. Transgranular cleavage of Si3N4 particles and ductile tearing of Al alloy matrix prevails, and debonding of Si3N4 particle/Al alloy interface is also observed in the composites.

AB - Si3N4p/Al composites prepared by squeeze casting were heat treated at 800-950°C. The phases, flexural strength, hardness, KIC and fracture morphology of the composites were tested and examined by XRD and SEM. The results indicate that 850°C is a critical temperature for heat treatment at which there occurs notable interface reaction between β-Si3N4 and aluminum, and hardness and strength of the composites significantly increases after heat treatment at temperature higher than 850°C, but its KIC decreases. Experiments of 45%vol Si3N4p/Al composites heat treated at 950°C show that the flexural strength, hardness, and KIC are 498MPa, 373HBS5/750, and 7MPa·m1/2, respectively, indicating a good combination of strength and toughness. Transgranular cleavage of Si3N4 particles and ductile tearing of Al alloy matrix prevails, and debonding of Si3N4 particle/Al alloy interface is also observed in the composites.

KW - Heat treatment

KW - Interface reaction

KW - Mechanical property

KW - SiN/Al composites

UR - http://www.scopus.com/inward/record.url?scp=55949090645&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:55949090645

SN - 1009-6264

VL - 29

SP - 36

EP - 39

JO - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

JF - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

IS - 5

ER -

Effect of heat treatment temperature on structure and mechanical properties of Si₃N_4p/Al composites

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Keywords

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