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<p>Nowadays, improper disposal practices like dumping or burning agro-industrial waste represent a worldwide environmental threat. These practices generate greenhouse gases, pollute soil and water, along with degrade air quality, causing global warming, degradation of soil, biodiversity loss, and various health issues. Agro-industrial waste materials exhibit significant potential due to their composition, which includes multiple ceramic elements. Rice husk ash (RHA) is an unwanted byproduct produced in rice mills after the harvesting of rice from paddy which is available in several places worldwide. The potential for rice mill wastes processing for reuse is promising, given the right approach as well as advancements in the field. The composite materials’ excellent blend of high strength, machinability, as well as lightweight makes them extremely attractive. Aluminium metal matrix composites (AlMMCs) remain gaining increasing popularity for their lightweight, good&#xa0;strength, stiffness, particularly in the automotive, energy, especially aerospace industries. Pure aluminium or&#xa0;alloys’ has limits hardness, low strength, as well as poor tribological performance prevent them from being widely used; waste particles incorporation&#xa0;may&#xa0;address these problems. RHA has a substantially lower density compared to AA7075 alloys, indicating its potential for lightweight applications. In this study the RHA containing 0, 5, 10, 15 and 20&#xa0;wt.% utilized as a dispersion phase in the matrix of pure aluminium (Al) as well as AA 7075 alloy through powder metallurgy (P/M) method. According to scanning electron microscopy (SEM) as well as X-ray diffraction (XRD) analysis, the RHA remained evenly dispersed throughout the matrix and did not produce any intermetallic compounds. A systematic investigation of the mechanical, structural, including morphological characteristics has been conducted. The addition of RHA consequences in arise in the tribological along with mechanical characteristics of the developed composites. The present investigation shows that adding 10 wt.% RHA in the matrix of pure aluminium (Al) as well as AA7075 alloy significantly improves its microhardness, compressive strength, and wear performance and insignificant effect on E value of developed composite when compared to other content.</p>

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Effect of Rice Husk Ash Addition on Mechanical as Well as Tribological Behaviour of AA7075 Alloy Composite for Lightweight Applications

  • 期刊论文

  • 发表日期：

    2025年10月2日

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  • Ziyauddin Seikh,
  • Sarfaraj Ansary,
  • Rafiqul Haque,
  • Golam Kibria,
  • Shamim Haidar,
  • Mukandar Sekh

摘要

Nowadays, improper disposal practices like dumping or burning agro-industrial waste represent a worldwide environmental threat. These practices generate greenhouse gases, pollute soil and water, along with degrade air quality, causing global warming, degradation of soil, biodiversity loss, and various health issues. Agro-industrial waste materials exhibit significant potential due to their composition, which includes multiple ceramic elements. Rice husk ash (RHA) is an unwanted byproduct produced in rice mills after the harvesting of rice from paddy which is available in several places worldwide. The potential for rice mill wastes processing for reuse is promising, given the right approach as well as advancements in the field. The composite materials’ excellent blend of high strength, machinability, as well as lightweight makes them extremely attractive. Aluminium metal matrix composites (AlMMCs) remain gaining increasing popularity for their lightweight, good strength, stiffness, particularly in the automotive, energy, especially aerospace industries. Pure aluminium or alloys’ has limits hardness, low strength, as well as poor tribological performance prevent them from being widely used; waste particles incorporation may address these problems. RHA has a substantially lower density compared to AA7075 alloys, indicating its potential for lightweight applications. In this study the RHA containing 0, 5, 10, 15 and 20 wt.% utilized as a dispersion phase in the matrix of pure aluminium (Al) as well as AA 7075 alloy through powder metallurgy (P/M) method. According to scanning electron microscopy (SEM) as well as X-ray diffraction (XRD) analysis, the RHA remained evenly dispersed throughout the matrix and did not produce any intermetallic compounds. A systematic investigation of the mechanical, structural, including morphological characteristics has been conducted. The addition of RHA consequences in arise in the tribological along with mechanical characteristics of the developed composites. The present investigation shows that adding 10 wt.% RHA in the matrix of pure aluminium (Al) as well as AA7075 alloy significantly improves its microhardness, compressive strength, and wear performance and insignificant effect on E value of developed composite when compared to other content.