Formation of needle crystals of magnesium pyroborate

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

“…Since the discovery of mineral suanite in nature [30], there has been active interest in synthesizing and characterization of the magnesium borate by means of various techniques [8][9][10][11][12][13][14][15]. Depending on the synthesis method, the Mg 2 B 2 O 5 nanowires, nanotubes and nanowhiskers can be produced.…”

“…These metal borates have good mechanical properties, such as high Young's modulus and strength, good chemical inertness, and low thermal expansion coefficient [8,13]. Furthermore, the metal borates whisker is cheaper than silicon carbide whisker [8]. Normally, Mg 2 B 2 O 5 whisker is synthesized from byproducts of seawater desalting or the compounds containing Mg and B of saline, its cost is much lower than that of aluminum borate whisker [13].…”

“…Recently, metal borate compounds including aluminum borate (Al 18 B 4 O 33 and Al 4 B 2 O 9 ) [4][5][6] and magnesium borates (Mg 3 B 2 O 6 [7] and Mg 2 B 2 O 5 ) nanowires/nanotubes [8][9][10][11][12][13][14][15] have been synthesized successfully. These metal borates have good mechanical properties, such as high Young's modulus and strength, good chemical inertness, and low thermal expansion coefficient [8,13]. Furthermore, the metal borates whisker is cheaper than silicon carbide whisker [8].…”

Morphology preservation and crystallinity improvement in the thermal conversion of the hydrothermal synthesized MgBO2(OH) nanowhiskers to Mg2B2O5 nanowhiskers

“…In contrast, 1D Mg 2 B 2 O 5 nanomaterials [36][37][38][39][40][41] have attracted more research interests for their wider applications. Traditionally, 1D micro-/nanostructured magnesium borates were prepared at relatively high temperature within 850-1250 1C via thermal evaporation or CVD technique [33][34][35][36][37][38], flux method [39][40][41], or supercritical method (500-600 1C, 200-1000 bar, 14 days) [42].…”

“…1D nanostructured magnesium borates, including MgB 4 O 7 nanowires [33], Mg 3 B 2 O 6 nanotubes [34] and nanobelts [35], Mg 2 B 2 O 5 nanowires [36,37], nanorods [38] and whiskers [39][40][41], etc., have been paid much attention in recent years for their wide usage as reinforcing components in the electronic ceramics [33], the wide band gap semiconductors [36], the antiwear additive [37], and the plastics or the aluminum/magnesium [41] matrix alloys. In contrast, 1D Mg 2 B 2 O 5 nanomaterials [36][37][38][39][40][41] have attracted more research interests for their wider applications.…”