ANALISA PERMUKAAN MATERIAL ALUMINIUM PADUAN (AlSiCu) HASIL NITRIDASI ION

Suprapto, Suprapto; Sujitno, Tjipto; Taufik, Taufik

doi:10.17146/gnd.2016.19.2.2999

Cited by 1 publication

(4 citation statements)

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“…This is due to the nitride layer presence which is indicated by white layer on the surface [6,11]. This layer has high hardness characteristic and high corrosion resistance [5,7]. The issue was the depth of this layer could not be determined well using SEM, due to the deeper diffusion of the nitrogen ion into the material.…”

Section: Sem-edx Analysismentioning

confidence: 99%

“…From those figures, we can see that the oxygen percentage on the surface of the sample with non-optimum parameter (100 ºC, 3 hours, 1,2 mbar) is 15,7 % while on the surface of the sample with optimum parameter (125 ºC, 4 hours, 1,2 mbar) is 29,3 %. The presence of oxygen after plasma nitriding was due to preparation process and the impurity of the nitrogen gas used during plasma nitriding [5]. Another reason why oxygen existed was that aluminium is one of the metallic material which is easy to merge to produce an oxide compound.…”

Section: Sem-edx Analysismentioning

confidence: 99%

“…Since the first damage of material happens on surface of material, surface treatment has existed in order to improve mechanical, chemical, and physical properties of material [4]. One of the surface treatment methods that could be applied to elevate aluminium's properties is plasma nitriding [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Plasma nitriding of aluminium was chosen because aluminium needs low temperature and pressure to form nitride layer on the surface of aluminium, while the conventional nitriding can treat steel only which has higher melting point than aluminium [7]. Although it is slightly hard to do plasma nitriding treatment of aluminium, this treatment apparently has an excellent result of its properties, such as high hardness, good resistance of corrosion and high resistance of wear [5,10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study of Microstructural and Corrosion Properties of Aluminium Alloy 7075 after Plasma Nitriding

Ahmadi¹,

Aziz²,

Suprapto³

et al. 2020

jsmi

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Plasma nitriding is a treatment process of metals by depositing nitrogen into metal that considered to be nitrided by mean of increasing the mechanical, physical, and chemical properties of the metal. This treatment will form a hard layer compund of Al-N on the surface of the sample. In this study, aluminium alloy 7075 was nitrided which the application of it to structural part of aircraft makes it vulnarable to not only corrosion and wear attack but also decreasing the hardness of the material. One method to overcome these issues is plasma nitriding. The purpose of of this research is to do the characterizations of plasma nitrided aluminium alloy 7075 regarding its microstructure, mechanical, and chemical properties. The characterizations that had been done were microhardness Vickers testing, SEM-EDX, and electrochemical corrosion testing Potensiostat. The hardness of the sample increased 55% from 75,88 VHN (raw material) to 117,68 VHN (at optimum parameter). The depth of the white layer of plasma nitriding is approximately 6 µm, while the EDX result reported carbon, oxygen, and nitrogen presence. Corrosion testing showed that the highest corrosion rate is on the raw material, 0,15393 mpy. While the optimum one is 0,07184 mpy.

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Section: Sem-edx Analysismentioning

confidence: 99%

Section: Sem-edx Analysismentioning

confidence: 99%