Development and preliminary process design of beta-SiAlONs by the spark plasma sintering process

Autor:	John Letwaba, O.O. Daramola, M. Seerane, Rotimi Sadiku, Isaac Tlhabadira, Ilesanmi Daniyan
Rok vydání:	2020
Předmět:	0209 industrial biotechnology Work (thermodynamics) Materials science Mechanical Engineering Sintering Spark plasma sintering 02 engineering and technology Process variable Microstructure Industrial and Manufacturing Engineering Computer Science Applications Taguchi methods 020901 industrial engineering & automation Control and Systems Engineering Scientific method visual_art visual_art.visual_art_medium Ceramic Composite material Software
Zdroj:	The International Journal of Advanced Manufacturing Technology. 109:2603-2613
ISSN:	1433-3015 0268-3768
Popis:	There is a need for improvement in the existing ceramic-based products such as the cutting tools due to the structural failures often experienced and the increasing operational costs. The development of refractory material (β-SiAlON) with excellent properties, such as high strength and wear resistance, is vital in order to meet the service requirements. In this study, the spark plasma sintering (SPS) technique was used for the sintering of ceramic powders, namely, β-Si3N4, AlN, Al2O3, and Y2O3, during the production of β-SiAlON. The density, wear behavior, hardness, and microstructure of the β-SiAlON produced were evaluated and optimized in relation to the effect of the sintering parameters in the following range: sintering temperature (1450–1750 °C), holding time (5–10 min), heating rate (50–100 °C/min), and the z-value (0–1.5). The approach is based on the Taguchi method which uses the signal-to-noise ratio and the analysis of variance to predict the optimum sintering parameters for maximum densification, superior wear resistance, and hardness of the resulting products. Thus, the properties of the sintered materials produced via the physical experimentations were measured as the products’ quality characteristics and statistically analyzed to determine the contribution of each process parameter to the measured properties. The following are combination of optimum parameters which produced excellent mechanical properties: maximum density (1600 °C, 10 min, 75 °C/min, and 1.5), superior wear resistance (1600 °C, 7.5 min, 100 °C/min, and 0.75), and hardness (1600 °C, 5 min, 75 °C/min, and 1.5). Hence, work provides an insight into the process design and determination of the optimal combination of the process parameters for the development of β-SiAlON with excellent mechanical properties via the SPS technique.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::589bfb2d2364a5eeed3c58592fa223f5 https://doi.org/10.1007/s00170-020-05846-1 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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