Review on properties of aluminium metal matrix composites

Nowadays, the global industries producing mechanical components are moving towards the usage of composites to reduce weight at the same time without compromising with characteristics of the material being used. This new combination of material provides specific desired properties when combined with various reinforcement materials like SiC, B4C, Al2O3, MgO etc., It is widely used in various industries like aerospace, automobile and marine industries. This property specific tailorable metal matrix composite with Al7075 as the base material can be fabricated using various techniques such as stir casting, high end ball milling, ultrasonic assisted casting, powder metallurgy, squeeze casting friction stir casting etc., out of which stir casting method is preferred by many researchers as stir casting method is seen to provide better distribution of reinforcement particles throughout the metal matrix. It is evident from the research of various authors that when the base material Al7075 is reinforced with the above-mentioned ceramic, it is found that there is a decrease in density and increase in hardness, compressive strength and wear resistance. Here, both physical and mechanical behaviour of aluminium reinforced composites with the effect of the particle size changes, effects after reinforcement and other processing and fabrication methods have been discussed

Dasar dan Perundangan Pengajian Pekerja Asing di Malaysia: Melestari Matlamat Pembangunan Mampan No. 8

Dalam memastikan kelastarian pembagunan ekonomi Malaysia pemintaaan pekerja asing meningkat saban tahun dalam sektor 3 D (Dangerous, Dirty, Difficult ataupun Bahaya, Kotor dan Susah). Pekerjaan Baik dan Kemajuan Ekonomi (SDG 8) merupakankan salah satu daripada 17 Matlamat Pembangunan Mampan yang berkait rapat dengan pekerja asing. Objektif utama kertas kerja ini adalah menganalisa dasar dan peruntukan undang-undang serta agensi berkaitan pekerja asing dalam konteks SDG 8 dengan mengunakan pendekataan kaedah kualitatif. Matlamat Pembangunan Mampan No. 8, merupakan titik kesimbangan sosial dan perkembangan ekonomi negara sangat diperlukan. Hak pekerja asing di Malaysia turut dilindungi dan tertakluk kepada pemakaian dasar dan perundangan sediaada. Namun kegitu kebanjiran migran dari pelbagai benua perlu dikawal supaya Malaysia tidak menjadi tempat ·pusat himpunan' pelbagai kerakyatan serta boleh mengundang pelbagai masalah seperti jenayah dan sosial dikalangan masyarakat setempat