Porównanie niektórych właściwości mechanicznych kompozytów ex situ typu Duralcan z kompozytami in situ Al-TiC

• Autorzy: Fraś E. , Kolbus A. , Janas A.

Warianty tytułu

EN

Selected mechanical properties of in situ Al-TiC composites compared with an ex situ Duralcan-SiC composites

• Języki publikacji: PL

Abstrakty

PL

W pracy opisano metodę in situ otrzymywania kompozytów AI-TiC o udziale objętościowym TiC 5% oraz 10%, ich strukturę oraz wyniki badań rentgenograficznych i mechanicznych, które następnie porównano z analogicznymi badaniami właściwości kompozytu Duralcan, zawierającego 5 i 10% cząstek SiC.

EN

Aluminium - based composites reinforced with particles of alien phases (MMCs) are considered products of the advanced technology. The service properties of MMCs can be controlled through changes in the type, content and dimension of reinforcing particles. In the case of MMCs based on aluminium alloys, the reinforcing particles used are most often carbides TiC, SiC, ZrC, oxides Al2O3, TiO2, MgO, ZrO2, nitrides BN, TiN, Si3N3 and borides TiB2, ZrB2,SiB2. In conventional route MMCs are fabricated by the ex situ methods, where the reinforcing phases are introduced to the metal bath by e.g. vortex process. A new interesting method of making composites is in situ process, where the reinforcing phases are produced directly in liquid metal as a result of the chemical reaction proceeding therein. In the in situ process it is possible to create a reinforcing phase nucleating in the metal bath, which ensures an excellent contact between this phase and the matrix enhanced by the phenomenon of a wettability of that phase by liquid alloy. In this paper the SHSB method of fabrication of the in situ composites Al-TiC was applied. The investigation was carried out on powdered titanium, aluminium and carbon of which after making the blend homogeneous and squeezed, briquettes of stoichiometric composition ensuring proper condition for the synthesis of TiC were formed. The synthesis of the composites was performed in a Balzers vacuum furnace, under argon protective atmosphere. After the exothermic reaction had taken place in the briquette and a suspension of TiC in aluminium alloys had been formed, the material was cast into steel mould. From the obtained castings, samples were taken for metallographic, structural and mechanical tests. In the second part of the experiment the Duralcan-SiC alloys were preparated. The X-ray examinations have revealed the presence of carbides TiC and Al3Ti in the AI-TiC alloys (Fig. 1a), and carbides SiC and Al4C3 in the Duralcan-SiC alloys (Fig. 1b). The structures of these two alloys are presented in Figure 2. Finally, the mechanical tests based on the test of isothermal sgueezing at temperature 293 K were performed (Figs 3 and 4). The results of this tests showed the AI-TiC MMCs have higher strenght compared with the Duralcan-SiC composites (Fig. 5).

Słowa kluczowe

PL

kompozyty; kompozyt ex situ; kompozyt ex situ Duralcan; kompozyt in situ; właściwości mechaniczne

EN

composites; composite ex situ; composite ex situ Duralcan; composite in situ; mechanical properties

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Kompozyty
• Rocznik: 2002
• Tom: R. 2, nr 4
• Strony: 176--179
• Opis fizyczny: Bibliogr. 9 poz., wykr., rys.

Twórcy

autor

Fraś E.

• Akademia Górniczo-Hutnicza, Wydział Odlewnictwa, ul. Reymonta 23, 30-059 Kraków

autor

Kolbus A.

• Akademia Górniczo-Hutnicza, Wydział Odlewnictwa, ul. Reymonta 23, 30-059 Kraków

autor

Janas A.

• Akademia Górniczo-Hutnicza, Wydział Odlewnictwa, ul. Reymonta 23, 30-059 Kraków

Bibliografia

• [1] Alcan Aluminium Corporation; US Patent 4 786467, 1988.
• [2] Górny Z., Sobczak N., Metalowe materiały kompozytowe, I Polska Konferencja Naukowa Materiały Kompozytowe, Kraków 1992.
• [3] Lloyd D.J., Particle reinforced aluminium and magnesium matrix composites, International Materials Reviews 1994, 39, 1, 1-24.
• [4] Sobczak J., Wojciechowski A., Kompozyty metalowe w przemyśle samochodowym, IV Seminarium PTMK Kompozyty 2000 - Teoria i praktyka, Częstochowa-Jaszowiec 2000, 159-169.
• [5] Froyen L., In situ processing of metal matrix composites: An overview. Proceeding of the International Conference Light Alloys and Composites, Zakopane 1999, 15-29.
• [6] Fraś E., Janas A., Kolbus A., Hugo Lopez, Metoda SHSB syntezy kompozytów in situ Al-TiC, IV Seminarium PTMK Kompozyty 2000 - Teoria i praktyka, Częstochowa-Jaszowiec 2000, 201-207.
• [7] Lee S., Euh K., Kim W.S., Shin K., Vacuum compo-casting process of A 356 aluminium alloy composites reinforced with SiC particulates, Aluminium Transaction 1999, 1, 41-49.
• [8] Ibrahim A., Mohamed F.A., Lavernia E.J., Particulate reinforced metal matrix composites - a review, Journal of Materials Science 1997, 26, 1137-1156.
• [9] Janas A., Podstawy wytwarzania kompozytu Al-TiC i ocena jego wybranych właściwości mechanicznych, Praca doktorska, Wydz. Odlewnictwa AGH, Kraków 1998.