In-situ synthesis of Al3Ti particles reinforced Al-based composite coating

Niu, Li-Bin; Zhang, Jumei; Yang, Xiaolan

doi:10.1016/s1003-6326(11)61330-7

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…However, certain reinforcement phases are subject to phase transformation at elevated temperatures and, thus, AMMCs exhibit unstable structure. As to in situ composite materials, reinforcement phases are formed during solidification, sintering, or synthesizing [7,[20][21][22]. Thus, in situ reinforcement phases make processes shorter and reduce the costs.…”

Section: Introductionmentioning

confidence: 99%

“…A356 alloys constitute the most important group of Al-Si-Mg alloys whose strength can be increased with Mg 2 Si precipitates in Al matrix [2][3][4][5]. Another important method used to improve the mechanical properties of the alloy is to compose stable in situ intermetallic phases in the structure [6][7][8]. In the production of aluminum metal matrix composites (AMMC), which are defined as materials having superior tribological properties, the most common materials used as reinforcement phase are SiC [9][10][11][12][13][14], Al 2 O 3 [15,16], TiB 2 [17,18] and TiC [19].…”

Section: Introductionmentioning

confidence: 99%

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Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Çam

Demir

Özyürek

2016

Metals

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Abstract:In this study, the effects of in situ TiAl 3 particles on dry sliding wear behavior of A356 aluminum alloy (added Ti) composites were investigated. The wear samples were prepared by adding different amounts of Ti (4%, 6%, and 8%) into A356 powder alloy by mechanical alloying. The mechanically alloyed powders were cold pressed at 600 MPa and sintered 530˝C for 1 h in argon atmosphere and cooled in the furnace. After the sintering process, the samples were characterized. The results show that AlTi and TiAl 3 intermetallic phases were formed and their amount increased depending on the amount of Ti added into A356 powder alloy. Out of the samples sintered with different titanium amounts (1 h at 530˝C), the highest hardness value and, accordingly, the lowest wear amount, were observed in the alloy containing 8% Ti.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Çam

Demir

Özyürek

2016

Metals

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“…Optik görüntülerde TiB2 partikülleri ile güçlendirimiş bölglerde aşınma izleri daha ince ve yüzeysel iken güçlendirilmemiş bölgelerde daha kalın ve derin olduğu görülmektedir. Şekil 7b'de net bir şekilde görülen derin izler daha çok malzeme kaybına neden olması bekelenirken, Şekil 7c'de görülen ince ve yüzelsel izlarin daha az malzeme kaybına neden olması beklenmektedir(Nachimuthu Radhika & Raghu, 2016) (Niu et al, 2012). Şekil 6'da görüleceği üzere alüminyum matrisli komozitlere göre Al-Cu matrisli kompozitlerin daha az aşındığı görülmektedir.…”

Section: şEkil 5 Tib2/al Ve Tib2/al-cu Kompozitlerin Ve çElik Malzemunclassified

Fonksiyonel Derecelendirilmiş TiB2/Al Kompozitlerin Abrasif Aşınma Davranışları Üzerine Deneysel Bir Çalışma

Savaş¹,

Demirok²

2019

European Journal of Science and Technology

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Öz Bu çalışma, Fonksiyonel derecelendirilmiş TiB2 takviyeli alüminyum matrisli kompozitlerin üretimi ve abrasif aşınma özelliklerinin araştırılmasına yöneliktir. Kompozitlerin üretiminde, takviye fazının oluşturulması in-situ tekniği ile yapılmış ve kompozitlerin nihai şekillerinin verilmesi ve fonksiyonel olarak derecelendirilmesi savurma döküm tekniği ile yapılmıştır. Üretilen kompozitlerin özelliklerinin araştırılmasında optik, SEM, XRD, sertlik ve abrasif aşınma testleri kullanılmıştır. Çalışmada abrasif aşınma testleri üç farklı yük (1, 2 ve 3 N), üç farklı hız (1.5, 3.5 ve 5.5 m/s) ve 100 m kayma mesafesinde 350 grid zımpara kağıdı altında yapılmıştır. Yapılan testler sonucunda üretilen kompozitlerin TiB2'ce zengin ve fakir iki farklı bölgeye sahip olduğu görülmüştür. TiB2'ce zengin bölgelerin abrasif aşınma özelliklerinin TiB2'ce fakir bölgelere göre daha iyi olduğu tespit edilmiştir.

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“…It is known that intermetallic particles, such as Al 3 Fe, Al 3 Ti, and Al 3 Ni that can in situ form through reaction during solidification of Al melts, have a good wettability and close coefficient of thermal expansion with Al matrix alloys, and thus, clean and strong interface can be obtained and they are considered as ideal reinforcements for Al matrix composites [ 1 , 2 , 3 , 4 ]. Among them, Al 3 Ti is more attractive because of its superior properties, such as low density, high melting point and Young’s modulus, and good thermodynamical stability in Al alloys [ 5 ]. Chen et al have fabricated Al 3 Ti particle (Al 3 Ti p ) reinforced Al matrix composite by direct reaction of Ti–containing fluxes with Al melt [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Alloying Elements on the Formation of Core-Shell-Structured Reinforcing Particles during Heating of Al–Ti Powder Compacts

2018

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To prepare core-shell-structured Ti@compound particle (Ti@compoundp) reinforced Al matrix composite via powder thixoforming, the effects of alloying elements, such as Si, Cu, Mg, and Zn, on the reaction between Ti powders and Al melt, and the microstructure of the resulting reinforcements were investigated during heating of powder compacts at 993 K (720 °C). Simultaneously, the situations of the reinforcing particles in the corresponding semisolid compacts were also studied. Both thermodynamic analysis and experiment results all indicate that Si participated in the reaction and promoted the formation of Al–Ti–Si ternary compounds, while Cu, Mg, and Zn did not take part in the reaction and facilitated Al3Ti phase to form to different degrees. The first-formed Al–Ti–Si ternary compound was τ1 phase, and then it gradually transformed into (Al,Si)3Ti phase. The proportion and existing time of τ1 phase all increased as the Si content increased. In contrast, Mg had the largest, Cu had the least, and Si and Zn had an equivalent middle effect on accelerating the reaction. The thicker the reaction shell was, the larger the stress generated in the shell was, and thus the looser the shell microstructure was. The stress generated in (Al,Si)3Ti phase was larger than that in τ1 phase, but smaller than that in Al3Ti phase. So, the shells in the Al–Ti–Si system were more compact than those in the other systems, and Si element was beneficial to obtain thick and compact compound shells. Most of the above results were consistent to those in the semisolid state ones except the product phase constituents in the Al–Ti–Mg system and the reaction rate in the Al–Ti–Zn system. More importantly, the desirable core-shell structured Ti@compoundp was only achieved in the semisolid Al–Ti–Si system.

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In-situ synthesis of Al3Ti particles reinforced Al-based composite coating

Cited by 13 publications

References 13 publications

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Fonksiyonel Derecelendirilmiş TiB2/Al Kompozitlerin Abrasif Aşınma Davranışları Üzerine Deneysel Bir Çalışma

Effects of Alloying Elements on the Formation of Core-Shell-Structured Reinforcing Particles during Heating of Al–Ti Powder Compacts

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